Part 1: In 2019, Bruce Wayne, the original Batman, retires due to failing health when his rescue of a kidnapped woman nearly goes wrong and he must resort to almost using a gun—the ultimate sin in his eyes.
Twenty years later in 2039, high-school student and former delinquent Terrence "Terry" McGinnis discovers Batman's identity after the aging Bruce Wayne helps him fight off a gang of Jokerz (street punks enamored by the original Clown Prince of Crime).
Howard Groote, a hopeless nerd, purchases an illegal android in the form of a beautiful girl to pose as his girlfriend.
Part 1: Terry is sent to Bruce's old friend Kairi Tanaka to brush up on his combat skills, and inadvertently befriends the heir-apparent to the criminal organization KOBRA.
Despite Bruce's warning not to join, Terry goes against it and soon discovers a conspiracy against the League, in addition to facing hostility from some of the members.