When antique restorer Lu Zhao's fingertips touched a blood-stained gear, the "Red Raincoat Serial Disappearance Case" that shocked the whole city twenty years ago was quietly restarted - the silver pocket watch of Shen Xingwan, a relative of the missing persons and a hyperamnesia patient, was always stuck at 19:47; former National Security Bureau agent Old K His stopwatch stopped at the coordinates of the 1998 case; and Lu Zhao's ability to see shadows when touching objects allowed him to see the last six seconds of the deceased's death amidst the clicking sound of gears: gears in a pool of blood, twisted clock parts, and a flash of scarlet raincoat.
The dismemberment case of a watchmaker in the old city, the case of retrograde suffocation in a subway tunnel, the case of evaporation from a secret room in a jewelry exhibition... Every seemingly independent murder case contains gear fragments that point to a series of mysteries twenty years ago. When Lu Zhao discovers that the burn mark on the back of his neck is burning in sync with the time scale of the crime scene, and when Shen Xingwan's hyperamnesia flashback exposes the bloody lies deep in his memory, all clues point to a crazy truth: the real murderer is not a human being, but a "time prisoner" trapped in the time cage from 1998 to 2025 - he is using serial murder to reconstruct the coordinates of time and space, trying to retrieve "that day" crushed by fate from the bite of the bloody gears.
This is an extreme reasoning between an antique restorer and a patient with hyperamnesia, a fatal bite between mechanical gears and human memory, and a redemption of time and space spanning twenty years. When the last gear is embedded in the death clock, you listen - the countdown is coming from the rusted gear box.
