The wedding night of Xianzo, the head of the Yiliu family, and Kezi, the niece of Kuboyinzo, separated from their bedroom, and suddenly the piano sounded. Everyone who left the scene saw Kenzo and Ke Zi falling down in a pool of blood. Jin Tian Yigeng, who attended the wedding at the invitation of Silver, went to investigate, but there was no sign of the prisoner escaping in the completely separated secret room. Then, three finger prints stained with blood were left on the golden screen of the room, and a Japanese knife was inserted in the courtyard.