The ventriloquist Tengan puts on a show about a ventriloquist who becomes possessed by hiis doll and murders his wife.
Tengan falls victim to a genuine split personality disorder, and the personality of his doll appears and orders him to kill his wife Kazuko. Tengan asks Kogoro to watch him so he doesn't kill his wife Kazuko, who had an affair with his apprentice Togawa, but Kogoro turns him down, saying it's not his field of expertise. The next morning, Kazuko is found murdered. Tengan confesses that he may have killed his wife while he was unaware, but... ...more