Simon is a sales representative about fifty. When Mickey, his cop friend, is being shot, he leaves everything to find the murderers. Two years before, Marx, an old gambler, met Frederic, a young man that does not look very smart and started to follow him everywhere (as a puppy) and changed his name to Johnny to please Marx. Of course, Simon's story is related with Marx and Johnny's one. But the thriller is only a pretext for a psychological description of the three main characters. 西蒙（让·雅南 Jean Yanne 饰）每天都过着同样的生活，新的一天对于他来说，不过只是对前一日的复制黏贴罢了。米奇（伊冯·巴克 Yvon Back 饰）是西蒙生命中唯一的指望，他人生里最快乐的日子，都是和米奇在一起度过的。 马克思（让·路易·特兰蒂尼昂 Jean-Louis Trintignant 饰）是浪迹街头的混混，在误打误撞中结识了名为强尼（马修·卡索维茨 Mathieu Kassovitz 饰）的男孩，哪知道强尼就此赖上了马克思，整天跟在他屁股后面，想要马克思带他加入黑帮。在一次执行任务的时候，米奇被人打伤陷入了昏迷之中，西蒙抛弃了生活中的一切，发誓要为自己的好友报仇。
