Born into a coroner family, Chu Chu teams up with the seemingly frail but brilliant Prince Xiao Jinyu, who oversees criminal cases within the court. With limited manpower and authority, the unlikely pair join forces to investigate a mysterious case buried for 18 years.

Aloof Prince Xiao Jinyu and imperial coroner Chu Chu navigate married life while teaming up with young investigators to solve bizarre cases and uphold peace in the Tang dynasty.