
Doug Heffernan puts in a long day's work delivering parcels and comes home each night to his loving wife, Carrie; unfortunately, he also comes home to his wacko father-in-law, Arthur.
Carrie discovers Doug's parents have shielded him from the truth for years by replacing his dog with look-alikes.
Upset about not getting his way after Carrie agrees to Arthur's choices for dinner and a movie rental, Doug tries to manipulate him into wanting the same things he does.
Doug and Carrie borrow twin beds while waiting for a new bed to be delivered and discover that doing things separately has advantages.
Newly slim Doug surprises Carrie with a romantic getaway to a resort in the mountains, but she discovers that he had been there with an old girlfriend.