In Fengtian in the 18th year of the Republic of China, Yi Ran opened a detective agency with thousands of dollars abroad, and worked with Bai Mo and reporter Luo Xuan to solve strange cases. The cold-faced marshal Zhang Junyin frequently issued "bans", but always secretly guarded her with her favorite osmanthus cake. From the murder case in the theater to the "sea ghost" on the pier, the reasoning of the case hides the bond of childhood and the foreshadowing of the heart. The two pairs of CPs gradually fell in love during the investigation, interpreting the suspense story of a sweet pet in the style of the Republic of China.
