Male nurse Greg Focker wants to pop the question to his girlfried Pam Byrnes. But she's daddy's little girl, and daddy, has some old-fashioned ideas about manners and manhood. So Pam and Greg make a pilgrimage to the Byrnes' homestead on Long Island. Greg gets off the wrong foot with Mr. Byrnes and never recovers. Little white lies mushroom into ghastly whoppers. Greg finds out that Mr. Byrnes was in the CIA for 34 years. And so the weekend goes from...

Valentina apparently has the perfect life in the United States. Her universe trembles when her boyfriend proposes marriage and must confront her family. Both will have to survive the cultural shock and their charismatic ex-boyfriend discovering in the way that in the end, the things that really matter have no surname or borders.

Through a series of misunderstandings, Alvin, Simon, and Theodore come to believe that Dave is going to propose to his new girlfriend in Miami, and dump them. They have three days to get to him and stop the proposal, saving themselves not only from losing Dave but possibly from gaining a terrible stepbrother.