They thought they had taken in a helpless widow.
By dawn, their son was gone, and the forest had claimed another secret—one that still whispers to those who offer shelter too freely.
It was a summer during the Zhenyuan era of the Tang dynasty of Cina.
The official road shimmered under the sun, its packed earth so hot it seemed to breathe.
West of Wangyuan Station, beyond a stand of old elm trees, stood a crude tea stall. Its owner, a man named Wang Shen, made his living selling bowls of water and weak tea to travelers passing through. That evening, he and his thirteen-year-old son were clearing cups as the heat finally began to ease.
The boy came running in, sweat streaming down his temples.
"Dad," he said, "there's a young woman by the road. She's asking for water. She looks… pitiful."
Wang Shen looked up.
At the edge of the door stood a young woman dressed in a faded green cloth jacket, her hair wrapped in a white mourning scarf. Her features were delicate, her posture respectful, though her face was pale with exhaustion. When she met Wang Shen's gaze, she bowed slightly.
"Uncle," she said softly, "I've come from the south. My husband passed away, and I have no children. My mourning period has just ended, and I'm traveling to Mǎwéi Station to seek relatives. I've been walking all day. Might I beg a bowl of water—and perhaps a place to rest for the night?"
Wang Shen was a kind man. Seeing her manners and her frailty, he nodded without hesitation.
"Come in," he said. "You can stay the night. There's no need to rush on in this heat."
His wife, upon seeing the girl, took an immediate liking to her. She admired her neat speech and gentle bearing, and soon was holding her hand, calling her sister, leading her into the back room. She even brought out some cloth and asked the young woman to help sew a few garments.
By dusk, several pieces of clothing were finished.
The stitching was astonishing—so fine it looked like strands of hair, better than anything made by the best tailor in town. The couple stared in disbelief. Wang Shen's wife felt her heart stir with a thought she could no longer keep to herself.
"My dear," she said with a smile, "you have no family to rely on. Why not stay with us? Become our daughter-in-law. Our son may be young, but he's honest and hardworking. You would not be mistreated here."
The young woman paused, then lowered her head, smiling shyly.
"I have nowhere else to go," she said. "If you'll have me, I will serve you as parents and keep this household well."
That very night, with no more than a simple ritual, the boy and the woman were married.
The air was heavy and stifling after dark. As the newlyweds prepared to sleep, the woman clutched her young husband's hand, unease flickering in her eyes.
"This area hasn't been peaceful lately," she whispered. "They say bandits roam nearby. We should bar the door tightly."
She dragged a thick wooden beam across the floor and wedged it against the door from inside.
Wang Shen and his wife retired to their room. To them, gaining such a capable daughter-in-law felt like a blessing from heaven.
But not long after falling asleep, Wang Shen's wife jolted awake from a nightmare.
In her dream, her son stood before her, hair wild, body soaked in blood.
"Mom," he cried, "I'm almost gone. I'm being eaten alive."
Her limbs turned to ice. She tried to rise, but Wang Shen pulled her back.
"Don't be foolish," he muttered. "We've just gained a good daughter-in-law. You're dreaming nonsense."
Uneasy but unconvinced, she lay back down.
Soon, sleep dragged her under again.
This time, her son's voice was sharper, more desperate.
"Mom, it's too late. My bones are showing."
She screamed and sat bolt upright.
"Something's wrong!" she sobbed, grabbing her husband. "Our son is in danger. We have to save him—now!"
Her terror infected Wang Shen. Heart pounding, he seized an axe from the corner and rushed toward the newlyweds' room. Together, they hacked at the door. Wood splintered. A sharp, metallic stench filled the air.
With one final kick, Wang Shen broke the door open.
What he saw nearly stole his breath.
Crouched beside the bed was a creature with blue-green skin, bulging round eyes, and sharp, animal teeth. In the torchlight, its gaze flashed like wet stone. The moment it was exposed, it sprang past them and vanished into the night, slipping back into the elm forest.
They staggered to the bed.
There was nothing left of their son—only a skull and a few strands of hair scattered across the blood-soaked bedding.
The gentle young woman was never human at all.
Later, people said the thing was a spirit that haunted the elm woods near Wangyuan Station—a creature that fed on blood and flesh to cultivate its power, most often disguising itself as a helpless young woman. Several households had already been destroyed after offering it shelter, though no one had connected the deaths.
They said its blue-green skin came from absorbing miasma from the forest, its round eyes and chisel-like teeth shaped by the lives it consumed. It feared iron and pure yang energy—had the door not been smashed with an axe, it might have erased all trace of itself before dawn.
But no tale, no warning, could ever bring back the child they had lost.
And so, when night falls near Wangyuan Station, the elders still say:
be wary of those who arrive too alone, too skilled, too perfectly in need of shelter.
Some guests do not come seeking refuge—
they come seeking to feed.