Good neighbors can be hard to come by and when the flighty Buddy Hall (Danny Devito) moves in across the street from the conservative Dr. Steve Finch (Matthew Broderick), it quickly becomes apparent that the two men are complete opposites. While Finch methodically plans out every minute of the coming Christmas season for his family, Buddy craves freshness and excitement and is seized by an impulsive desire to decorate his house so brightly that it can be seen from space. While the men’s wives Kelly (Kristin Davis) and Tia (Kristin Chenoweth) and their children revel in one another’s differences and form solid friendships, a rivalry of personalities and Christmas spirit ensues between the two men that will wind up testing the patience and love of every member of both families.