In the old teaching building of Mingde Middle School, the desks in the back row of Grade 3 (7) class are always stuck in a strange shadow. No matter how strong the sun was, it couldn't penetrate the triangular darkness, as if something had chewed off a piece of it.
Ten years ago, the girl Lin Xiaoman sat at that desk and always said that there was a voice calling her name in the shadows. Until one rainy night, she clutched half of a bloody eraser and disappeared into the teaching building. The surveillance camera only captured a pale shadow pulling her ankle and dragging her into the shadow under the desk.
The first day that transfer student Su Xiao was forcibly assigned to this seat, she discovered that shadows could move. It climbed up her school uniform along the table legs like a living thing. The copper lock locked deep in the drawer automatically popped open at midnight. Inside lay a diary - the handwriting was exactly the same as Su Xiao's homework book when she was in elementary school. On the last page, there was a picture of a girl swallowed by the shadow, and next to it was written: "It's your turn."
When Su Xiao's name began to appear in the disappearance files from ten years ago, and when her classmates were haunted by shadows one after another and told the same nonsense as Lin Xiaoman's before his death, she realized that the shadow was never formed naturally. It was waiting for the next "Lin Xiaoman", and she had long since become the prey chosen by the shadow.
