In this star-studded comedy for the whole family, young Peter (Oakes Fegley) is not too pleased when his mom (Uma Thurman) makes him give up his beloved bedroom to accommodate Grandpa (Robert De Niro). Desperate to get his room back, Peter decides to wage all-out war and devises all sorts of wild schemes to make Grandpa give up the room. However, Grandpa refuses to surrender easily and soon...