While returning from a business trip to Hokkaido, Detective Kamei of the MPD greets a middle-aged traveler in the waiting room of Minami-Wakkanai Station but is ignored by him. On the limited express to Asahikawa, the same man happens to entrust Kamei with a floppy disk before dying. The floppy contains his investigative notes on a murder that happened two years ago...
Depois que o Doutor Jean-Marie sequestra um grupo de crianças na esperança de criar uma forma de vida definitiva, Jiban entra em ação para salvá-las e derrotar o exército de monstros de Jean-Marie.
