By the time the night-cycle lamps dim in our block, most of the building has gone quiet. Gran usually stays in the sitting room until June and I are asleep, reading one of her old paper books but tonight, a thin line of light slips from beneath her door long after the corridor has emptied. I am about to ignore it and return to bed when I hear something scrape across the floor inside her room, followed by a low sound that seems to come from beneath the apartment itself. It is not loud, but it makes the cup on my bedside table tremble.
The pipes in our block complain often enough that I know what they sound like. They rattle when the water pumps change shifts, and the walls hum whenever the ventilation system is pushed too hard, but this noise is deeper than either of them, as if something vast has shifted below the foundation and settled again. I pull on my trousers, leave the trembling cup untouched, and step into the corridor barefoot. The light beneath Gran's door has not moved, but now I can hear her speaking in a voice so quiet that I cannot make out the words.
I stop outside her door with my hand raised to knock, unsure whether I am more afraid of waking her or of finding that she has been awake all along. Gran speaks to herself when she cannot sleep, usually reciting old names from the books she keeps hidden in the lower drawer of her desk, but the sound beyond the door is not anything I recognize. Her voice rises and falls in a language that seems older than the Sanctum, and beneath it comes the same slow vibration that shook my cup when I was in bed. When I press my palm against the door, the wood is cold enough to make me pull back.
I almost call her name, but the thought of June asleep across the hall stops me. If Gran is ill, I do not want to frighten June, and if she is not, I do not want to explain why I am standing outside her room in the middle of the night. I lean closer instead, listening through the door, and catch a single clear word between the sounds of that unfamiliar language... my name.
I push the handle down before I can persuade myself to wait for an answer. Gran's room is darker than it should be because her desk lamp is off, leaving only a strip of pale blue light beneath the window shutter. She is kneeling beside her bed with both hands pressed over a narrow crack in the floor tiles, and when she looks at me, the fear on her face makes me forget why I came to the door.
Gran rises too quickly and has to brace herself against the bedframe before she can speak. "Kaelen, how long have you been standing there?" she asks, covering the crack with the hanging edge of her blanket. I look past her hand and see a thin line of white light moving beneath the broken tile, bright enough to show through the cloth. Whatever has frightened her is not outside our apartment, because it is already moving beneath the floor at our feet.
"Gran, what is happening under the floor?" I ask, but the question is swallowed by a harder tremor that sends the glass on her desk sliding against the wall.
Gran catches the edge of the desk before it tips, then turns to me with a look that is more desperate than frightened. "Kaelen, go back to your room and do not wake June. You cannot stay in this room," she says, lowering her voice as though she is afraid of being overheard. I want to demand an explanation, but the white light below the blanket spreads through the crack in a thin, branching line. The sound rises with it until I can no longer tell whether I am hearing it through the room or inside my own chest.
Then the vibration stops so suddenly that the silence feels worse. A voice moves through the room, not loud enough for the walls to carry it, but clear against the back of my thoughts. It says my name once, slowly and carefully, as though it has been practicing the shape of it for years. When the blanket slips from her hand, Gran looks at me as if the floor has opened beneath us, and I know she heard it too.
Gran moves before I can ask what it is. "Kaelen, do not say anything to it," she tells me, and the sharpness in her voice makes me step back toward the door. She drops to her knees again, pressing the blanket over the split in the tiles as if she can force the light back into the stone. I have spent my whole life watching her meet trouble without showing it, from ration shortages to security checks, but I have never seen her hands shake.
Gran sees me looking at her hands and folds them into the blanket, as though hiding the shaking will make it disappear. "Go back to bed, Kaelen," she says, keeping her eyes on the crack. "If you hear that voice again, you must not answer it." I want to ask how she knows it will return, but the floor gives one final pulse beneath us and the white light fades from the tiles.
I wait for Gran to explain, but she does not look at me again. Instead, she reaches beneath the collar of her nightshirt and closes one hand around the small metal key she has worn for as long as I can remember, though she has never let June or me touch it. "Please go, Kaelen," she says, and the change in her voice makes my questions feel cruel rather than urgent. I leave because I have never heard Gran ask me for anything that way.
June's door is closed when I pass it, and the quiet behind it makes me slow down. I stand in the corridor for a moment, listening for another tremor, but the block has returned to the familiar sounds of sleeping people, distant water pipes, and the low breath of the vents. When I reach my room, the cup beside my bed is perfectly still. That should make me feel better, but it only makes Gran's fear harder to explain.
Sleep does not come easily after that. I lie on top of my blanket and watch the shadow of the ventilation grate move across the ceiling while I try to make sense of what I heard. The voice did not sound like Gran, a neighbour, or anything that belonged in the Sanctum. Now that I think about it, it didn't even sound human. By the time exhaustion finally pulls me under, I have decided that I will make Gran tell me the truth in the morning.
When the first work bell sounds, I wake with my hand hanging over the side of the bed and a dull ache behind my eyes. For a few seconds, I lie still and convince myself that the night was nothing more than a dream made from bad sleep and old stories. Then my fingers brush the floor beside the bed, and I feel a crack in the tile that was not there when I went to sleep.
I pull back the blanket and find that the crack has spread into a pattern. Four thin lines curve outward from a small circle in the centre, each ending in a sharp point that faces a different wall of the room. The stone around it is smooth and dark, as if the mark was pressed into the tile while it was still soft. I do not know what it means, but I know it was not there last night.
I hear June moving in the room across the hall, and the sound breaks whatever spell has held me there. I drag the narrow floor mat from the foot of my bed across the mark and smooth it down with both hands, even though I know it will not hide anything from someone who is looking for it. Gran asked me not to tell anyone, but she had not told me what to do if the sign followed me into my room. I take a quick bath, pull on my uniform and leave before I can lose the courage to ask her.
Gran is at the small table when I enter, pouring June a cup of watered grain tea with hands that no longer shake. She has changed into her work clothes and arranged her paper book beside her plate, which is how she looks whenever she wants the rest of us to believe that nothing has happened. June is tying her hair at the mirror and complaining about the work bell, so I cannot ask about the symbol without breaking Gran's warning. Instead, I sit across from her and wait for her to look at me.
Gran finally looks at me when June turns to find her bag. Her expression remains calm, but she taps the table twice, a signal that means I should listen and not speak. "After training, go to the Culture Center and ask to see the oldest records they will allow you to read," she says, loud enough for June to hear. I have never heard her ask me for anything like that, and the way she avoids my eyes tells me that she already knows what I will find.
June looks up from her bag with the curious frown she gets whenever Gran gives an order that has nothing to do with food, work, or school. "Why would Kaelen want old records?" she asks, and Gran answers before I can decide whether to lie. "Because the past is easier to understand than the trouble he keeps finding in the present." The joke sounds almost normal, but Gran does not smile when she says it.
June is the first to leave, calling a quick goodbye as she disappears into the corridor with the other younger students. Gran waits until the door seals behind her before she leans across the table. "When you get there, look for a circle with four paths leading from it," she says. "Do not ask anyone what it means." I have not told her about the mark beside my bed, and the fact that she knows makes the room feel cold again.
"How do you know about the mark?" I ask, keeping my voice low. Gran's gaze shifts to the black security lens above the sink before she answers, and that small movement tells me that the walls are not the only thing we have to fear. "I know what it can lead to," she says. "That is all I can tell you now."
Gran opens the paper book beside her plate and slides a folded strip across the table. It contains a shelf number, a date from before the Second Breaking, and three handwritten words: Material Archive, Level Two. "Do not use a terminal," she says. "The system does not remember everything that was kept there."
I fold the strip into my pocket, aware that Gran is watching me as though I have just agreed to something I do not understand. The work bell sounds again, longer this time, and the people in the corridor begin moving toward their shifts. Gran closes her book and reaches for her tea, but before I leave, she says, "If anyone asks, Kaelen, you slept through the night."