Fight Club Spoiler

The film 'Fight Club' stars Edward Norton as a depressed young man who doesn't like his work and gets no sense of reward from it, attempting instead to drown his sorrows by putting together the "perfect" apartment. He can't sleep and feels alienated from the world at large; he's become so desperate that in order to relate to others he's taken to visiting support groups for patients with terminal diseases so that he'll have people to talk to.

One day on a business flight, he discovers Tyler Durden played by Brad Pitt, a charming rebel who sells soap. Tyler doesn't put much stock in the materialistic world, and he believes that one can learn a great deal through pain, misfortune, and chaos. Tyler challenges his new friend to a fight. Our Narrator finds that bare-knuckle brawling makes him feel more alive than he has in years, and soon the two become friends and roommates, meeting informally to fight once a week. 

As more men join in, the "fight club" becomes an underground sensation, even though it's a closely guarded secret among the participants. 

First rule: Don't talk about fight club.

Second rule: Don't talk about fight club.

But as our narrator and Tyler bond through violence, a strange situation becomes more complicated when Tyler becomes involved with Marla, played by Helena Bonham Carter, whom our narrator became infatuated with when they were both crashing the support-group circuit.

The narrator soon realises that Tyler Durden is in fact a split personality of the narrator and Tyler is actually part of the narrator. Tyler then informs the narrator of his plan: to blow up all local credit card buildings, and by doing so corrupting the society in which they live in. The narrator is determined to stop it and he informs Marla to leave before bursting into one of the buildings and disarming the bomb in its bottom.

Tyler fights the narrator, pulls out a gun and carries him to the top of the building. However, since they are the same person, the narrator realises that the gun is in his hand and in order to destroy Tyler, he shoots himself in the jaw. Tyler disappears from the narrator, because finally he has killed him/himself and Marla and a group of Fight Club members arrive, and together with the enlightened narrator are watching the credit card buildings fall down.