The opening scene establishes the setting of a city and creates tension with an exploding window. Two clowns are shown inside the damaged building, frightening the audience. A mysterious man is seen holding a clown mask outside, and he gets in a car with other masked men. They discuss robbing a bank and mention their leader, "The Joker." During the bank robbery, the mysterious man places grenades on hostages. As chaos ensues, he proves to be the most skilled and dangerous of the group. At the end, he is revealed to be the infamous villain "The Joker" after removing his mask while threatening the injured bank manager.