Batman and Dick Grayson are invited to a top-secret demonstration hosted by Professor Hugo Strange and his assistant Dr. Harley Quinn that may eventually change the future of Gotham forever. Along the way, Batman takes a stop at Gotham State Penitentiary to visit Catwoman (whose suicide attempt from Batman: Return of the Caped Crusaders somehow failed) to give her a book on poetry by Elizabeth Barrett Browning. This is something to keep her occupied for the next 36 months until she is let out of prison for good. At the laboratory, they meet district attorney and Bruce Wayne's ally in the war against crime Two-Face who is famous for having stopped a coin counterfeiting gang while keeping a two-faced quarter as a souvenir from the case.