Set in the middle and late Tang Dynasty. Chu Chu, a young girl from coroner family in southwest mountainous area, comes alone to the capital to chase her dream of becoming a professional coroner. Prince An (Xiao Jingyu), a competent detective, accepts her as a coroner partner for mysterious cases investigation. Chu Chu, Prince, and their friends break the balance of multiple forces in the capital, figure out the truth of a blockbuster case which continued for 18 years step by step. Chu Chu and Prince get married at last.