THE MOON · FOURTEEN MONTHS SINCE THE SHIP LEFT
"Ah," said Urahara, reading the console with his chin on his hand. "They've brought a key."
The gallery over the accelerator was in its night cycle, and the glass ceilings had gone the deep blue of a city at two in the morning.
Below him the Hōgyoku turned in its case and threw slow petals of light onto his hat.
Three small lights had burned steady on the console for months. Questions out of the dark, and he had let them go on asking.
Tonight they came on in order, at the same spacing, twice over. That was somebody keeping to a timetable.
Somebody on Earth had built a door to the Moon, and he had watched them build it for four months.
Lovely work, too. An anchor buried by hand at each end, an agreed hour, and one body per crossing.
And sunlight took the whole thing apart, which was the family resemblance. Aizen's own door came apart in sunlight too.
Urahara opened the fan he had not been holding.
Three levels up, a boy lay asleep. He had turned twelve in the winter, and Urahara had given him a sky for it. One city's stars, and a thunderstorm at four.
"Right," Urahara said, and set the hat straight. "In you come."
* * *
The visitor arrived at 0212 in the lower service ring, and he was good.
He came out of the dark carrying no light, and stood listening to a corridor that had nothing in it to hear.
Then he went at the first bulkhead without touching the lock, and it opened for him like a shop at nine.
Under the hair at the back of his head there was a seam, badly made and long healed. Somebody had opened his skull once and put something inside it.
At the second bulkhead he stopped and laid a flat hand on the wall. Three metres of rock above him, and above that nothing, forever.
Then he took his hand off it and got on with the job, which was the most impressive thing he did all night.
Urahara watched from an alcove one level up, with a lamp and no hurry, and let him come four hundred metres in.
Past the coolant gallery. Past the sample library. Past a door on the fourth turning with far more seals than an honest door needs, where he slowed and did not stop.
Then a boy who was supposed to be asleep came round from the mess with a cup.
The cup hit the deck.
The shadows on either side of him peeled up off the floor and stood. Shikigami, dogs he called out of his own shadow, and not puppies any more.
White and black, shoulder-high, ears flat. His hands were set before he had finished deciding to be frightened.
The visitor did not draw anything. He raised a barrier, one clean sheet of it, the way a man puts up an umbrella.
"Go back round the corner, please," he said. "I'm not here for you."
The white one hit the barrier and came off it. The black one went low and found the same nothing.
Megumi held them there, standing in a spilled drink in his socks, and did not go back round the corner.
Urahara counted eleven seconds. Two of them, full size, in front of a man who could have unmade the pair without raising his voice.
The boy's nose had started to bleed somewhere in the middle of it. He had not noticed, which was the part worth writing down.
Then the section seals dropped, fore and aft, three tonnes of them, and the visitor was alone in a much smaller corridor.
* * *
The clogs came down the ramp at walking pace, which under the circumstances was almost rude.
"Evening," said Urahara. "You've made very good time."
The visitor stood in the middle of the corridor with the sheet of barrier in front of him. Thirty-five or so, and built like a man who carried things for a living.
"You're the technician," he said, without heat.
"Caretaker. Different job, worse hours."
"Sit down against that wall and I'll go round you." He meant it. That was the strange part. "I've no orders concerning you at all."
"That's a very kind offer."
"My name's Sagara."
"Is it."
"It's the one they gave me. You should have one of mine, at least."
Urahara looked at the barrier for a second and decided not to spend his night on it.
He held out a hand, and there was a cane in it. He had not drawn it or taken it out of the coat.
That was his whole trade. Anything he understood all the way down he could stand up out of cursed energy, and it would be as real as the floor.
Not only objects. A reaction, a field, a pressure. He did not build a bomb. He built the going off.
"Then I'm sorry," Sagara said, and knelt, and laid a bare palm flat on the deck.
Twenty metres away, a bar of deck plate rose out of the floor like a finger out of water and caught Urahara under the ribs.
He went into the wall and slid down it, and the fan came apart in his hand.
"Ah," he said from the floor. "That's it, is it."
Whatever his bare hand touched, and everything solidly joined to it, was one thing to him. One piece, from his palm to wherever it ended.
And he could push any part of that piece out anywhere along its length.
So he never had to cross the corridor. He only had to get a hand down.
Urahara built a wall across the corridor, four inches thick, and Sagara came up through the floor underneath it and took him across the collarbone.
"Yes," Urahara said, cheek against his own wall. "That was stupid of me."
He gave ground after that. Twelve metres, then twenty. He kept to the doorways and stopped in them, and Sagara began to find that irritating.
"You're counting."
"Bleeding, mostly." He was doing both.
Nothing had come at him yet out of a door frame or a bolted panel.
Twice a bar started up out of the deck, reached the rubber strip across a threshold, and stopped there like a dog at a gate.
Urahara had laid those strips seven years ago, so the base would not ring every time the accelerator turned over.
Then Sagara stopped fighting him, which was the cleverest thing anybody did all night.
He walked to the aft seal, put both palms flat on it, and began to work.
Behind that seal was a ramp, and past the ramp a boy in his socks.
Urahara came out of the doorway.
He got four steps. Sagara did not turn round.
The deck opened under him and put a spike of itself through the meat of his thigh. He heard it happen before he felt it.
He came down on his side, and the cane rolled away.
"Stay there," Sagara said, still working. "Please. I'd rather not."
He meant that too.
Urahara lay on his own floor and looked at the rubber strip six inches from his nose.
"You've never once come at me through a seam," he said.
The hands did not stop.
"You need it joined. One piece, no gaps. Which means you have to be touching it." He got an elbow under himself. "Skin on it."
"Most people need to touch things."
"Mm." He was smiling, and it was not a nice one. "Not here."
He put his good hand on the wall panel beside him and built a pressure.
Not a wind. A difference. A few pounds on the far side of every service panel in the section.
Behind them ran the maintenance trench, four hundred metres of it, and every gram of rock that had ever come in off the surface came in through there.
The panels let go all down the corridor at once, both sides.
Earth dust is old. Wind and water have rolled it round and tired and harmless over four billion years.
Nothing on the Moon has ever been rained on.
Every grain in that trench was still the shape a meteorite had made it. Splinters and hooks and little glass daggers, worn down by nothing at all.
And it clung. Dry, charged, desperate for a surface.
It went to Sagara the way filings go to a magnet. Urahara had not needed to charge a thing. Dust up here does that by itself.
It found his cuffs and his collar and the seam under his hair. It went into the bearings of his tool, and the tool stopped being a tool.
His barrier stood where he had put it and stopped nothing, because it had never been asked to.
Nobody builds an umbrella against weather that is already in the room.
He got a palm back on the seal and nothing happened. He wiped it on his coat, put it back, and nothing happened again.
"You need to touch it," Urahara said. "You are not going to touch anything again tonight."
Between his skin and the base there was a film four grains thick, and it would not come off.
Dirt washes because water gets under it. This had never met water. It held on by static, the way a balloon holds to a wall, and rubbing only charged it further.
And the dust was no use to him either, which was the part he worked out last.
A hundred million loose grains are not one thing. They are a hundred million things.
He knelt on a floor he could no longer reach, in a room made of objects he was no longer allowed to hold.
Then he came anyway, which Urahara had not expected and rather admired.
He dropped the barrier, because a man with nothing left uses his hands, and came down the corridor blind with his coat full of glass.
He was fast. On Earth he would have had him.
He pushed off the deck the way he had pushed off ten thousand floors, and the Moon took the difference.
A man weighs a sixth of himself here. It was the same shove he had used all his life, so it carried him six times as far, with nothing under him to correct against.
He came in on time and a foot too high, and his hands went over Urahara's head.
Urahara did not hit him. He put the cane in behind the trailing ankle and turned it.
There was no weight in the man to argue with.
Sagara went into the ceiling shoulder first, hard, and came down out of it slowly, the way things do here.
Urahara was standing where he landed. He had walked there.
He put a knee on the man's chest, which was the most physical thing he had done in nine years, and took his tools off him one at a time.
"Sorry about your floor," Sagara said. His eyes were streaming and he could not see anything at all.
"Sorry about my ceiling," said Urahara.
On his way out he closed the service panels and set the tools down by the aft seal. Neatly, and within reach.
He let the pressure settle back to what it had been at midnight, because he wanted the gauges honest.
Then he let the fore seal down behind him, leaned on it, and had a very quiet minute about his leg.
"Forty-one," he said to his watch. "That'll do."
* * *
"You're bleeding on my floor," Urahara said, coming up the ramp. His own leg left a mark every second step. "Infirmary."
"You first."
"Mm." He handed over a cloth without looking, set the lamp down and woke the wall panel. "Suit yourself."
An ordinary life-support terminal, one of sixty on the base. Two columns of figures, oxygen and nitrogen.
Under the first column a line ran back an hour and a half, and all of it went downhill.
"That started at twelve past two," Urahara said. "About four seconds after he was through the first door."
Megumi had watched the end of it on a wall panel two levels up, in a corridor he had been told to stay out of. He looked at the line, then at the man leaning on the desk to stay upright.
"So all of that was for nothing?"
"All of that was for time. And for company." He got the spare fan out of his sleeve. "A man who is winning does not check his air."
"He's good, you know. Look at that, he's filtering. First thing he did in a stranger's house was decide not to trust the air."
"Only a filter is a subtraction. It takes things out. It cannot put one single thing back in."
"So it will strain out any poison I care to add. It cannot hand him back a single breath of what I quietly remove. Nobody has ever complained about that, because nobody has ever needed it to."
The boy watched the numbers.
"You don't feel your oxygen," Urahara said. "You never have."
He tapped the second column, and the nitrogen climbed to meet it.
"What makes you gasp on a hill is the carbon dioxide stacking up behind it. That is the only alarm bell you own. My scrubbers are taking his away beautifully, so he will never once be short of breath."
"And a man knows what thin air feels like. Thin air is a mountain. Low pressure, cold ears, fingers going stupid."
"So I put nitrogen back in exactly as fast as I take the oxygen out. One molecule for one molecule, so the push on the walls never changes. His pressure gauge does not move."
"A mountain at the pressure of a valley. Warm, and spread over an hour and a half. Nothing in him gets one single moment to say, ah, that's different."
A shrug.
"Every gauge in here reads normal. It is normal. It simply isn't enough."
Air is a fifth oxygen. At twelve past two the first column had read 0.209.
It read 0.118 now. It had not stopped.
"You were in there with him," Megumi said.
"Forty-one minutes of it, and it never went past the seals." He tapped the fore seal on the schematic. "It was a hill in there when I walked out. It is a mountain now, and he has had it to himself."
"That is what I was counting. Not him. Me."
The rest of the base sat on the other side of three tonnes of door, breathing whatever it had been breathing at midnight.
"Will it kill him," Megumi said.
"Not unless I'm careless." He did not look round. "I'm never careless. I'm only ever early or late."
"He can't see," Megumi said. "You blinded him."
"Eyes wash themselves. It's the one part of a man that does." The panel light moved on the brim of the hat. "He'll be crying it out for a week and he'll work through most of it."
"You gave him his tools back."
"I left them where he could find them." The fan turned over. "A man with a job to finish does not sit down and take stock."
"He works. He breathes harder for it. He spends what I am taking twice as fast as he would resting."
It took ninety-four minutes from the first door.
He finished the seal he was working on and did it well. He started the next one and did it slowly.
Around the sixtieth minute he sat down to rest, stood up again, and could not remember why he had stood up. He laughed at himself the way a man does at a party.
At the eightieth he checked his filter, found it working perfectly, and said to nobody, comfortably, "Still clean."
It was. That was the whole trouble with it.
Urahara went down and stood at the glass.
"I never touched your barrier, sir. It's a lovely barrier. I'd have been all night."
A polite little bow, to a man who could no longer quite see him.
"I only changed the price of breathing."
The visitor smiled at something over his shoulder and went over sideways.
Urahara looked at the clock and made a mark in a small book.
"Ninety-four," he said. "I had it at eighty-eight."
He sounded put out.
Megumi stood ten metres back with the cloth at his nose. He watched the shopkeeper write down a number that had mildly annoyed him, and said nothing.
The door on Earth would open again at 0500. That hour had been agreed between the visitor and the men who sent him, months ago, and nothing Urahara did could move it by a minute.
So at 0500 the visitor went home on a trolley, with a fresh cartridge in his filter, because the old one was nearly spent and he had a long way to go.
He had been allowed exactly three true things on the way in, and Urahara had chosen all three of them for him.
That the house had a vault in it, three doors and a stairwell down.
That the house held twenty-one researchers and not one soldier.
And that the master of the house was away.
The third had taken the most arranging.
* * *
The infirmary smelled of clean linen and the ghost of rain. Megumi sat on a bed with a cold pack on his neck and a cup of chocolate by his knee, untouched.
"You let him walk in," he said.
"Four hundred and twelve metres." Urahara sat on the next bed and got the bad leg up onto it with both hands.
"He could have killed me."
"No." He did not smile when he said it, which was rare enough that the boy looked up.
"That corridor was made safe two hours before he came through it. Four ways out, and I owned all four."
"If he had looked at you wrongly he'd have been behind three tonnes of door before the thought reached his hands."
He turned the hat over.
"Your father made a promise about you a long way from here. I don't let people break promises in my house. Not by accident." A pause. "Especially not by accident."
Megumi worked at that for a while.
"So it didn't matter," he said. "What I did."
"You didn't know that." Urahara set the hat back on his head.
"Nobody told you the room was safe. You put yourself between him and the rest of my Moon, and held two full-grown shikigami for eleven seconds."
"That part is yours. It's the only part that ever belongs to anybody."
He stood, badly, and nudged the cup an inch closer with a knuckle.
"Drink that. Sleep till second bell. Be unbearable to a physicist in the morning."
At the door Megumi said, "Why did you let him go?"
Urahara paused with a hand on the frame.
"Because a man who escapes goes home and tells his masters what he saw," he said. "And a man who dies tells them what he didn't."
Megumi got it halfway down the corridor. A man who never came home would have told them, louder than any report, that this Moon held something worth killing for.
* * *
The workshop at six smelled of solder and burnt sugar. Urahara laid the visitor's route out on the glass and looked at it the way you look at handwriting.
It went round the coolant gallery on level three. That gallery floods for eleven minutes every night cycle, and no plan of this base says so. You learn it by living here.
It went round the store room stencilled SPARES, which had held mislabelled samples since the second week, because none of the physicists would own up to the mistake.
The stencil still said SPARES. Only somebody who worked here knew what was behind it.
And it started at an anchor buried in ground nobody had dug since the base was poured.
Which meant it went in years ago, while there was still a hole to put it in, with somebody standing there watching.
Nobody had stolen this route. Somebody had drawn it.
Three facts, and one man sitting at the junction of all three.
He ran the sample library, so he knew what was in the wrong room. He had been on the crew that poured the base, so he had been there for the hole.
He took his coffee with far too much sugar and apologised every time. He had never once asked Urahara for anything.
He kept a photograph in his coat pocket of a girl who had been ten when he last saw her. She would not be ten now.
Urahara could have the man in a locked room in nine minutes, and the anchor out in the sunrise by Thursday, and the door shut for good.
And then Earth would know their man was burnt, and send somebody else he had never heard of, by a route he could not see.
A door you have locked is a door. A door you leave open, and can watch, and can put things through, is a correspondence.
He was not going to shut it. He was going to start writing on it.
* * *
The dawn came up the eastern glass on schedule and the mess smelled of bread.
Twenty of the twenty-one never learned that anything had happened at all.
The twenty-first knew. He put his coffee down twice, and said nothing, and Urahara wished him a good morning and meant it in every way he was capable of meaning things.
Then he opened the crew roster on the glass by the mess door, found the name, and put a small neat mark beside it. The sort of mark a man makes against something he means to come back to.
He did not cross it out.
"Well," he said, and went to make the chocolate, leaning on the cane, because the boy would be up within the hour and would want some, and would say that he didn't.