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.
While Christmas shopping at the mall, Doug loses his wallet and begins a quest to find the wallet and the culprit who may have stolen it. But with no help from Carrie or the cops, he requests the help of Arthur.