杰克（爱德华•诺顿 饰）是一个大汽车公司的职员，患有严重的失眠症，对周围的一切充满危机和憎恨。
一个偶然的机会，杰克遇上了卖肥皂的商人泰勒（布拉德•皮特），一个浑身充满叛逆、残酷和暴烈的痞子英雄，并因为自己公寓失火而住进了泰勒破旧不堪的家中。两人因缘际会地成为了好朋友，并创立了“搏击俱乐部”：一个让人们不戴护具而徒手搏击，宗旨在于发泄情绪的地下组织。
俱乐部吸引了越来越多的人，逐渐发展成为一个全国性的地下组织，而泰勒也以自己个人的魅力，吸引着那些盲目的信徒。俱乐部的成员们到处滋事打架、大肆破坏，泰勒本人的行为也越来越疯狂。
杰克对于“搏击俱乐部”的现况及泰勒的行为越来越无法忍受，和泰勒发生争执，泰勒离开了他。然而，杰克发现，他走到何处都无法摆脱泰勒的影子，他开始思考：我到底是谁？

It's Millennium Eve and Blackadder is hosting a dinner party for a few select friends, Lady Elizabeth ('Miranda Richardson' ), Viscount George (Hugh Laurie), Archbishop Melchett (Stephen Fry), and Archbishop Darling (Tim McInnerny). Baldrick (Tony Robinson) devises yet another of his infamous cunning plans to help his ever greedy master Edmund Blackadder (Rowan Atkinson) con money from his gullible friends. The pair build a "time machine" from empty cereal packets and place bets with their friends as to when in history they will travel, retrieving various artifacts from their travels as proof, items which Blackadder already owns! However, in a strange twist of fate the time machine actually works and the pair are thrown back in history initially to the Jurassic period. Gradually the pair start to return to their own time stopping off at various famous times in history such as Sherwood Forest and the Battle of Waterloo but will they make it home?

Summary written by Mark Smith from IMDB