约翰·瑞特、艾美·扬斯贝克与杰克·华登主演这部爆笑喜剧,片中充满无厘头的幽默。善良的班·西利(瑞特饰)与他攀高结贵的妻子芙洛(扬斯贝克饰),领养七岁的朱尼尔(麦可·奥立佛饰),想让生活更快乐。但不久朱尼尔将普通的露营旅行、单纯的生日派对,甚至小联盟棒球赛,变成惨不忍睹的恶梦。班认为他的新儿子只是缺少关爱,于是容忍朱尼尔惹是生非,但容忍是有极限的。正当班要采取激烈行动,才发现这个小恶魔的内心是渴望关爱的天使。这部讽刺喜剧描述现代家庭生活。The story of a seven-year-old mischievous orphan boy named Junior. He is hardly a model child; mean-spirited and incorrigible. One day, he is adopted by a loving man along with his obnoxious wife named Ben Healy and Flo Healy. Ever since Junior comes into their lives, he turns ordinary days into full-scale comic nightmares! He also leaves a path of serious destruction in his wake, and is even pen pals with Martin Beck (A.K.A. The Bow Tie Killer, a notorious serial killer who kidnaps his faithful correspondent, along with Flo). And now it's up to Ben as he undertakes a rescue mission to get Junior back from Beck before he plans on hurting him.