Jack (Edward Norton) is an employee of a large automobile company. He suffers from severe insomnia and is full of crisis and hatred for everything around him. By chance, Jack met Taylor (Brad Pitt), a soap seller, a rogue hero full of rebellion, cruelty and violence. Because his apartment caught fire, he moved into Taylor's dilapidated home. The two became good friends by chance and founded the "Fight Club": an underground organization that allows people to fight barehanded without protective gear and aims to vent their emotions. The club attracted more and more people and gradually developed into a national underground organization, and Taylor also attracted those blind believers with his personal charm. The members of the club caused trouble and fought everywhere, and Taylor's behavior became more and more crazy. Jack became more and more unbearable about the current situation of the "Fight Club" and Taylor's behavior, and had a dispute with Taylor, and Taylor left him. However, Jack found that he could not get rid of Taylor's shadow wherever he went, and he began to think: Who am I?