After 10 years of marriage and two children, it seems that Greg Focker has finally earned a place in the ``circle of trust'' of his uptight father-in-law, Jack . However, Greg is moonlighting with a drug company, which raises Jack's suspicions. As two clans descend on the scene of the young twins' birthday party, Greg must find a way through myriad misunderstandings to prove to Jack -- once and for all -- that he is worthy of being the next family patriarch.
