On Ye Wantang's first day of employment, her master gave her an unsolved case: a red coffin floated from the river, with a woman in a wedding dress lying on the coffin. The director pounded the table and cursed for a long time. His meaning was very clear. If the case could not be solved in three days, he would get out. She trembled and went to check. As soon as her hand touched the coffin lid, her head buzzed - she saw the scene of a woman being nailed in alive. Someone spoke in my ear with a cold breath: You are the first person to see me and the only one who is still alive. Ye Wantang turned around and saw a man in a shroud standing behind him, who looked exactly like her master. Master Shen Du was drinking tea in the antique shop without raising his head: That is my twin brother, who died ten years ago.