After being rejected from the police college, a mannerly man travels to Bangkok where he and an energetic distant relative must solve a murder case.

Driven by the desire for the huge reward, Tang Ren tricked Qin Feng to New York, to attend the World Detective Contest. Later on, behind the crazy competition, Qin and Tang discovered the real hidden facts of this contest.

Following the excitement of first Bangkok and then New York, a big murder case takes place in Tokyo. Chinatown master detectives Tangren and Qinfeng are invited to take up the mystery. Adding to the excitement are the other detectives on the CRIMASTER international detective list as well as the current top rank, Q. Yet another hilarious battle of wits is set to take place...

In 1900, a white woman was murdered in Chinatown in San Francisco, and the suspect was a Chinese man. The murder caused social shock, and people demanded the closure of Chinatown.