Actor Bruce Willis and writer/director M. Night Shyamalan reunite after the surprise success of The Sixth Sense for this supernatural thriller. David Dunn (Willis) is taking a train from New York City back home to Philadelphia after a job interview that didn't go well when his car jumps the tracks and collides with an oncoming engine, with David the only survivor among the 131 passengers on board. Astoundingly, David is not only alive, he hardly seems to have been touched. As David wonders what has happened to him and why he was able to walk away, he encounters a mysterious stranger, Elijah Prince (Samuel L. Jackson), who explains to David that there are a certain number of people who are "unbreakable" -- they have remarkable endurance and courage, a predisposition toward dangerous behavior, and feel invincible but also have strange premonitions of terrible events. Is David "unbreakable"? And if he is, what are the physical and psychological ramifications of this knowledge?　　一场火车对撞的惨剧夺去131名乘客的性命，大卫•杜恩（Bruce Willis 布鲁斯•威利斯 饰）奇迹般地成为这场灾难过后的唯一幸存者，且浑身上下毫发无伤。在他参加遇难者追悼会之后，他在车窗上发现一张神秘便条，写道：“你这一生生过几次病？” 　　不久，一个名叫伊利亚•普莱斯（Samuel L. Jackson 塞缪尔•杰克逊 饰）的黑人出现在大卫面前。和大卫不同的是，伊利亚天生手脚残废，脆弱不堪。喜爱漫画的伊利亚认定大卫就是书中那种具有超自然能力的超人。懵懂的大卫开始在伊利亚的引导下认识自身的能力……