Room 404 of the seemingly ordinary normal university girls dormitory "Lanhuixuan", the night freshman Su Wanwan checked in, she found a line of blood writing under the bed board: "At twelve o'clock at midnight, you will be closed to bed and do not return. Violators..."
She thought it was a prank until the clock struck midnight, the doors and windows of the dormitory building were blocked by invisible forces, and the sound of wet footsteps came from the end of the corridor...
Lin Che, the new young counselor, seems to be well aware of the weirdness here. When he forcibly intervened in the investigation and were trapped together with Su Wanwan in the dormitory building that circulated around midnight, they discovered that the building itself was a living curse.
Behind every closed dormitory door, there may be "guests" forgotten by time. The only way to break the curse is to uncover the dust-covered truth about the mass suicide that enveloped the entire school forty years ago...
When the bedtime bell rings again, do you dare to look back?
