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 becomes jealous when Carrie makes the mistake of telling him she finds Deacon attractive; The gang go paintballing to celebrate Deacon's birthday, which turns into a war of jealousy.