Brad and Dusty have become best friends since the events of the last film, and Dusty is now married to author Karen. The two decide to do away with separate Christmas celebrations and have a "together Christmas". Things get bad when Dusty's tough fighter pilot/astronaut father Kurt and Brad's overbearing and over-cheerful dad, Don, unexpectedly arrive for Christmas. Having not seen the children since they were toddlers, Kurt may wind up driving the two families apart.