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 finds it unbearable working with Carrie when she takes a temporary job at his company during the holidays. Arthur tries to get various friends to pose for a Christmas card picture with him.