Divorcee Scott Calvin is disgusted to learn that his ex and her husband have tried - and failed - to break it easy to their 6-year-old son Charlie that Santa isn't real. On Christmas Eve, Scott reads The Night Before Christmas... then receives an unexpected visitor on his roof. When he's startled by Scott's calling out and falls, the Santa impersonator disappears, leaving only an 8-reindeer sleigh and a suit with instructions to put it on if he's involved in an accident. Scott does, and is...