When forensic doctor Su Qing dissected the sixth female body in a red dress, she discovered that there was a lens fragment engraved with "006" hidden in the deceased's mouth - this was the third secret room murder case this month with the same technique. All the victims were dressed in red dresses, and the neck marks were arranged in a strange tic-tac-toe pattern. Deep in their mouths, there were digital codes pointing to a certain ritual.
When Interpol Captain Zhou Yan followed anonymous clues to the abandoned textile factory, seven hanging corpses in the underground secret room suddenly came into view: they were suspended at specific angles in a tic-tac-shape, and the neck strangulation marks exactly matched the scars of the latest victim. What's even more shocking is that Su Qing found a yellowed photo in the secret pocket of his collar. Seven women in work clothes were standing in front of an old well. The face in the middle was scratched with a sharp weapon. On the back of the photo, it was written: "1986.6.15, The beginning of reincarnation."
As the investigation deepened, Su Qing discovered that each of the deceased had used their fingernails to carve tiny symbols on the palms of their hands before they died - those were the work numbers of the seven dance team members who disappeared collectively in the textile factory more than 30 years ago. When the seventh body was discovered in the cement pipe, Su Qing's scalpel cut open the back of the deceased's neck, and unexpectedly brought out a strand of silver hair wrapped in cotton wool: exactly the same as the note "Su Qing (substitute)" on the missing list thirty years ago.
The murderer is like an obsessive walking in the cracks of time, recreating the tragedy of 1986 with red skirts, strap marks and digital codes. And Su Qing gradually realized that she was actually 70% similar to the woman whose face was blackened in the photo. This sacrificial ceremony spanning thirty years is pushing her to the center of the seventh "well"...
