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.
Arthur is moved upstairs to Carrie's office once the weather gets cold, but have problems when the weather warms up and Arthur thinks his move was permanent.