Ethan and Ally are spending their first Christmas with separated parents. When Ally goes to Macys and asks Santa for her parents to get back together, Ethan feels obligated to try to make it happen. He doesn't want Ally to think there isn't a Santa and as her older brother he sets out to try and make it happen. What he doesn't realize is how hard it will be.
Ethan gets his best friend to help with the scheme and also acquires the new friendship of Stephanie, a daughter of one of his mother's friends. He also has an individual motive of getting to hang out with Stephanie more while planning. He comes up with a scheme to get his dad and mom trapped in the same room over Christmas Eve. He figures that if he can get them together and alone that the rest will happen between them. Ethan knows that his dad wants his mom back in a way but just doesn't know how to make it happen. So that's what he does. He gets them alone together.
If you've never seen this holiday classic... watch it! It's got a great cameo in it by Lauren Becall as their grandmother! It also has another cameo of Leslie Neilson as Santa Claus.