The incident started with a bizarre case. Miss Bai San, who had a grudge against Ji Lou Xinyue, was poisoned and died when the two met. In order to unravel the truth of the case, Lu Yifan, the county government master, gradually launched an investigation with the help of his childhood sweetheart Tang Tian (?)... The cause of Miss Bai San's death, the conflicting meeting time, the non-toxic osmanthus candy... However, behind the case, Lu Yifan discovered more mysteries. Lou Xinyue's life experience, Tang Tian's secret, and the real culprit in this case... But please believe me, this is not a mystery novel, really.