Every Christmas happily unmarried Brad and Kate escape divorced parents and exasperating relatives by getting on a plane. This year a fog rolls in, the airport shuts down and the couple is forced to celebrate four family Christmases in one hectic, hilarious day. Vince Vaughn and Reese Witherspoon lead an all-star cast in a comedy brimming with good cheer and great laughs - as well as the answer to the question: Can Brad and Kate's relationship survive Four Christmases?