Cheng Yu was once the sharpest knife in the Hong Kong Crime Unit.
An arrest failed and the informant died. He was suspended for review and transferred to the old case archives. He became a troublesome figure in the police force who "can solve crimes but no one dares to use them."
Until a funeral, there is an extra hand in the coffin that does not belong to the deceased.
Everyone thought it was a mistake at the funeral home, but Cheng Yu saw something was wrong from an old mahjong parlor chip. The autopsy conclusion of forensic doctor He Zhinan pushed the case further: the hand was not formed recently, and the shape of the old burn on the wrist was consistent with the ship's plate number in Cheng Yu's father's belongings.
Fifteen years ago, Cheng Yu's father, Cheng Zhengnan, was accused of leaking secrets and was involved in the "9·17 Pier Bombing" and then fell to his death.
Fifteen years later, a series of serious cases in the old port have resurfaced: cries in the walls, faceless passengers, wedding dresses in freezers, the missing thirteenth floor, living people who have been written off, and empty drawers in the police station.
Each case is like an independent mystery.
Behind every mystery, there is someone erasing the names of old cases.
Cheng Yu originally thought that what he wanted to check was his father's innocence, but later he realized that what his father had hidden back then was not a piece of evidence, but a group of people who were still alive.
