卡利是一名个性马虎的单身汉,哥哥两夫妻有事出门,拜托他过来住几天照顾孩子,不料经过几个顽皮小孩的拆腾之后,这位叔叔竟然变成了一个负责任和有耐性的人。As an idle, good-natured bachelor, Uncle Buck is the last person you would think of to watch the kids. However, during a family crisis, he is suddenly left in charge of his nephew and nieces. Unaccustomed to suburban life, fun-loving Uncle Buck soon charms his younger relatives Miles and Maizy with his hefty cooking and his new way of doing the laundry. His carefree style does not impress everyone though - especially his rebellious teenage niece, Tia, and his impatient girlfriend, Chanice. With a little bit of luck and a lot of love, Uncle Buck manages to surprise everyone in this heartwarming family comedy.