In the crime-ridden city of Gohan, there is a name that makes criminals tremble with fear: Batman. Batman (Michael Keaton) travels through the darkest corners and fights crime everywhere. In an operation to fight crime, Batman caused the gangster Niba (Jack Nicholson) to fall into a chemical pool. As a result, Niba's facial nerves were damaged, and he became a smiling man with a permanent grin, known as the "Joker". The "Joker" killed the leader of the gang and controlled the entire underworld of Gohan. The "Joker" used chemicals to make people laugh and die. He used this method to attack the museum. Fortunately, Batman arrived in time and thwarted the "Joker's" conspiracy. When at his girlfriend Brigitte's (Kim Basinger) home, the "Joker" suddenly attacked. Batman cleverly avoided the attack and accidentally discovered that the "Joker" was the enemy who killed his parents. The "Joker" kidnapped Batman's girlfriend Brigitte this time and agreed with Batman to fight to the death on the roof of the church!