讲述了汽车修理工程天乐（姜武 饰）落魄无助，无意中从一位老者手中获得一把能穿越不同世界的钥匙，这把钥匙可以带他通往有钱有权、与校花卓彦妮（蒋勤勤 饰）拥有美满婚姻的新世界。频繁穿梭于两个世界的程天乐，一边享受A世界家庭的温馨，另一边享受B世界富豪的奢华生活，可是却逐渐对自己所追求的完美生活开始迷茫......

With the help of a magic key, Cheng Tianle, who is facing a mid-age crisis and suffering the pain of infertility of his wife, opens a door to another world to become a billionaire who lives in the world of wine and women and marries his high school dream girl. However, not before long, Cheng gets tired of travelling between the two worlds and gradually becomes lost in the world of his own desire.