Fight Club was a 1999 film based on the novel of the same name starring Brad Pitt, Edward Norton, and Helena Bonham Carter. The Narrator (Norton) is the discontented protagonist of the film who is sick of his job and his life. He begins attending support groups for people with terminal afflictions and learns that letting his guard down to complete strangers is very therapeutic. After the dissolute Marla Singer (Bonham Carter) starts showing up at his support group meetings, and the stranger dynamic is ruined, The Narrator is again unable to escape the limitations of his own character flaws. As a defense mechanism his personality splits and Tyler Durden (Pitt), who is everything The Narrator wishes he was, springs to life. "Together" they discover a new type of support group when they start an underground streetfighting movement called Fight Club. This movement eventually morphs into Project Mayhem, which quickly becomes very dangerous and out of control.

Throughout most of the story, The Narrator does not know that Tyler Durden is actually him, and he becomes involved in a twisted relationship with Marla Singer in which he is both jealous of and disgusted by himself.