Jûzô Inui is an extend: he has been implanted with a revolver in place of his head. Since the Great War, he has earned his living in this teeming city of other extends. His business? Solve cases in which extends are involved. One day, Jûzô receives a strange visit from a man pursued by the police for kidnapping. He asks Jûzô to protect the child that he himself kidnapped…!! However, the sprawling and dark multinational Beruhren will enter the game... Jûzo is far from suspecting the hornet's nest into which he has just stuck his nose!
