Life’s good for deliveryman Doug Heffernan, until his newly widowed father-in-law, Arthur, moves in with him and his wife Carrie. Doug is no longer the king of his domain, and instead of having a big screen television in his recently renovated basement, he now has a crazy old man.
Doug's kingdom comes under attack when his recently widowed father-in-law, Arthur, moves in rather than go to a retirement home, turning Doug's TV room into Arthur's bedroom.
After seeing photos of Carrie's stout mother, Doug worries that Carrie will gain weight as well, and tricks her into starting a diet.
Doug is afraid he'll lose Carrie when her boss drives her home in his Jaguar and gives her tickets to see a famous cellist.
Doug learns a secret about Richie's wife after a disastrous dinner party.
Doug is uneasy when Arthur starts dating Doug's aunt, especially when the relationship becomes intimate in his basement.
When Doug takes Carrie's dad out for the night, Carrie shows her appreciation in a very amorous way, which leads Doug to spend more time with Arthur.
