Su Wan, a 28-year-old forensic doctor, has the ability of photographic memory and is so calm that he is almost indifferent.
On her first day at Anning Private Hospital, she received an "Employee Code" with only eight regulations: Don't look at the mirror in the morgue, don't walk alone in the corridor after three o'clock in the morning, don't look back when someone calls your name, don't ask why...
Everyone in the hospital warned her that she must abide by the rules in order to survive.
But Su Wan is a forensic doctor.
Her job is to keep asking why. Why die? How was he killed? Who caused the tragedy? In every mystery, she digs out the truth.
The first strange corpse appeared quietly. The medical diagnosis was heart failure, but the deceased's eyes were wide open, his pupils shrunk to the size of a pinhead, and his face was filled with fear that penetrated his bones, as if he had seen something indescribable horror before he died.
Su Wan took out the small mirror she carried with her and unexpectedly glimpsed another world in the morgue.
The door is open, there is no mirror in the room, and there is a blue-green light floating everywhere.
The body that had long been declared dead was walking towards her step by step through the mirror.
The deceased warned softly: Don't believe in rules.
Su Wan instantly understood the cruel truth: the rules of Anning Hospital have never been to protect the living, but to be a cage to imprison everyone. The dead are not completely dead and are trapped in the space on the other side of the mirror; the creator of the rules relies on a steady stream of fear to maintain this twisted and terrifying order.
She stepped into the abyss resolutely.
