The plum blossom code left at the scene of the serial murder case is exactly the same as the murderer's mark that Ye Wan witnessed when she was ten years old.
The three deceased were all related to an unsolved case many years ago, and Ye Wan was the only surviving witness to that unsolved case.
As the investigation deepens, she discovers that the murderer is not killing people - he is "rehearsing" a play. And she herself is the "protagonist" who has long been selected in this drama.
What's even more frightening is that her memory, her talent, and even her choice to become a detective-may all be programs written in the script.
Concept: Every victim is related to an unsolved case ten years ago