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...

Bei Xiaobei is a self-abased writer because he feels himself too fat. Because of his poor appearance, he often ran into a wall in real life. Later, he unwittingly finds a long dusty family tree and accidentally crosses through the ages to meet with his ancestors.