Teddy Duncan's Middle Class family embarks on a road trip from their home in Denver to See Mrs. Duncans Parents, the Blankenhoopers, at Palm Springs. Once they find themselves stranded between Utah and Denver , they try to hitch a ride from Roswell into vegas with a seemingly ordinary bunch at a station wagon. As it happens that the couple thinks they are the victims of alien abduction. The Duncan's must resort to buying a clunker Yugo have their bag stolen in vegas, to get at Utah, and survive a zany Christmas with Grandma and Grandpa Blankenhooper.