The Boy Detectives and the Phantom Twenty Faces

In 1936, in the imperial capital of Tokyo—a letter of warning arrives at the home of businessman Shotaro Hashiba from a thief calling himself "Twenty Faces," who is after the Romanov royal family's treasure. With the Metropolitan Police Department's security at its highest, how will the thief succeed in his crime?! The showdown between the shape-shifting thief, Twenty Faces, and the legendary detective Kogoro Akechi begins!!