Sorozat figyelő naptár a sorozatokhoz

A high school girl on her way to school finds a dead man on the path to her house. As Detective Ishikawa and the others walk to the scene, he sees a disheveled man sitting at the corner. There's no ID on the man, and the is found to have a strange mark on his chest which may have caused his death. The victim, who can't remember his name or what happened, follows Det. Ishikawa everywhere, vowing to stay until the case is solved. Was this man the latest victim of the "bashing mugger"?