When 1930s Tokyo is threatened by a master thief who can disguise himself to look like anyone, and laughs at the law, the people of the city have nowhere else to turn but Japan's greatest detective, Akechi Kogoro. Unfortunately for Tokyo, however, Akechi Kogoro is off on overseas business, so it becomes the job of his 12-year old assistant, Kobayashi Yoshio, to track down the thief and desperately keep him at bay until his mentor returns.

In the spirit of Sir Arthur Conan Doyle's Baker Street Irregulars, a classic thriller by Edogawa Rampo, grand master of Japan's Golden Age of crime and mystery fiction. Filled with disguises, tricks, "A-ha!" moments, and spiced with a unique Japanese flair, it is sure to delight readers of all ages. Will Kobayashi's intrepid band of young detectives be able to outwit the nefarious fiend, or will Tokyo be forever at the mercy of the face-swapping phantom?