Juan Debré has spent a lifetime playing a hero in a popular TV series. When he is diagnosed with a terminal illness, he withdraws from his everyday life. Aware of having wasted his life, he escapes from a film shoot to travel to Brussels. In the land of his childhood hero, Tintin, he seeks to answer a question that has haunted him all his life: ?Could I be a real-life hero??
故事发生在1836年，德克萨斯的军事堡垒阿拉莫遭到了独裁者安东尼奥（埃米利洛·艾切瓦利亚 Emilio Echevarría 饰）带领的精锐部队的攻击，这也就意味着，驻守在阿拉莫的两百名平民，必须要面对数千名装备精良的专业士兵。这是一场根本就不可能胜利的战争。 在这命悬一线的紧要关头，威廉少尉（帕特里克·威尔森 Patrick Wilson 饰）、詹姆斯（杰森·帕特里克 Jason Patric 饰）和西部牛仔大卫（比利·鲍伯·松顿 Billy Bob Thornton 饰）勇敢的站了出来，领导着其他来自各行各业的勇士们和敌人展开了殊死搏斗。十三天后，阿拉莫尸横遍野，然而，勇士们所争取到的时间使得萨姆将军（丹尼斯·奎德 Dennis Quaid 饰）得以领兵赶往此处，并且最终击退了墨西哥军队。
