The sealed file for the National Archives' seventh unsolved case suddenly begins to seep dark red slime.
The moment Lin Yang puts on gloves and touches it, he hears a woman scream: “He's inside the wall!”
Beneath the wallpaper of the century-old murder house, where the crime took place, fresh drops of blood emerge in a coded sequence.
The forensic report says the victim's heart has vanished without a trace, yet the body's fingerprints appear on the murder weapon from a family massacre thirty years ago.
Late-night security footage captures a headless figure in the corridor, repeatedly carving the same string of numbers: Lin Yang's police badge number.
He breaks through the basement's brick wall and finds countless glass jars containing hearts that are still beating.
The labels on the jars show that all the hearts belonged to victims of unsolved cases. The dates stop at tonight.
When the final heart stops beating, warm blood begins seeping from the walls of the entire murder house.
Amid the pool of blood, Lin Yang picks up a yellowed photograph: himself as a baby in swaddling clothes, with the smiling caretaker standing behind him.
