Fog City, a city soaked in sea fog all year round. In an abandoned theater in the old city, a male corpse was found - neatly dressed, with a calm face and a strange smile hanging on the corner of his mouth. There was only a silver mirror beside him, as clean as new, without leaving any fingerprints.
Detective Lin Mo was ordered to investigate. He has intermittent amnesia, an unexplainable sense of instant vision, and an intuition for solving crimes that is more accurate than any criminal investigation manual and seems to come from the depths of his memory. The second, the third, the fourth... Each corpse appeared in the same way, dying with a smile on its face, a mirror by its side.
The forensic doctor found that each victim "experienced" the death of another person before death - the memory was so real that it was so real that he suffered cardiac stress arrest.
Lin Mo gradually discovered that the starting point of all cases pointed to the three months when he was shot and comatose three years ago. That silver mirror, that number "7", those fragments that he thought he had forgotten——
Someone is using other people's memories to kill people. Lin Mo's mind held the core secret of this serial murder.