Matt and Amy's families gather for their holiday celebration. Coordinating airport pickups, shopping trips and a meal for 25 guests is almost too much for Amy to manage. The chaos reaches a fever pitch when Matt begins a last-minute project: a giant 30-foot "tree of lights" he hopes will be seen from miles away. The family gathering includes Matt's brother Sam (a little person), Amy's parents Gordon and Pat, and a guest appearance by Santa himself.