故事讲的是二十郎当岁的威尔史密斯饰演17岁的高中生威尔史密斯，住在黑人占76%，比较贫穷的西费城。由于招猫逗狗惹是生非，被老妈送到洛杉矶的阿姨家。

When Will, an inner-city teenager from Philly is sent by his mother to live with his relatives (the Banks") in Bel-Air, everybody is in for a sur