女主人卡萝失踪已久的前夫罗伊突然出现,并且想和卡萝及三个女儿再续天伦之乐,但是卡萝的现任老公麦克可不会袖手旁观,任人破坏现今美满的家庭。但问题出在这个破坏者是卡萝失踪且未离婚的合法老公,到底这个“脱线家族”要如何以他们“少根筋”的天性,来解决这个凡人难解的三角习题A man claiming to be Carol Brady's long-lost first husband, Roy Martin, shows up at the suburban Brady residence one evening. An impostor, the man is actually determined to steal the Bradys' familiar horse statue, a $20-million ancient Asian artifact.