罗素(布鲁斯·威利斯 Bruce Willis 饰)人到中年,事业上成绩平平,感情生活一片空白,忙忙碌碌大半辈子,所得也仅能用“乏善可陈”来形容。一次偶然中,罗素遇见了一个看起来十分眼熟的男孩,令罗素感到吃惊的是,这个男孩不是别人,正是8岁时的自己(史宾塞·布瑞斯林 Spencer Breslin 饰)。 费了好大的功夫,罗素才让小罗素相信,自己就是32年后的他,而令小罗素十分失望的是,原来自己并没有如同理想中的那样成为一名帅气的飞行员,而是长成了默默无闻形单影只的落魄中年人。为了改变自己的未来,小罗素决定帮助未来的自己,在和小罗素相处的过程中,罗素亦走出了迷惘,重新看到了希望。Russ Duritz (Bruce Willis) is a wealthy L.A. image consultant, but as he nears 40, he's cynical, dogless, chickless, estranged from his father (Daniel von Bargen), and he has no memories of his childhood. One night he surprises an intruder (Spencer Breslin), who turns out to be a kid, almost 8 years old. There's something oddly familiar about the chubby lad, whose name is Rusty. The boy's identity sparks a journey into Russ's past that the two of them take - to find the key moment that has defined who Russ is. Two long-suffering women look on with disbelief: Russ's secretary, Janet(Lily Tomlin), and his assistant, the lovely Amy, to whom Rusty takes a shine. What, and who, is at the end of this journey?