Danny (Adam Sandler) must engage Katherine (Jennifer Aniston), his faithful assistant, to pretend to be his soon to be ex-wife. Danny must pretend that he is married, because he lied to his dream girl, Palmer (Brooklyn Decker) the most gorgeous woman in the world. To keep the woman he loves, covering up one lie soon turns into many lies.

Brad and Kate have been together three years, in love, having fun, doing all sorts of things together with no intention of marriage or children. Christmas morning, they're on their way to Fiji, having told their two sets of divorced parents that they're off to do charity work. Through a fluke, they have no choice but to visit each of their four idiosyncratic parents. As the day progresses, Brad and Kate remember growing up, each learns more about the other, and Kate realizes that her life may...