While tagging along to England with his lovely vet girlfriend, Garfield's owner John Arbuckle inadvertently brings Garfield along, where he winds up being mistaken for Prince, the royal cat of a lordly estate. There's a plot afoot to steal Prince's lands and title, orchestrated by the nefarious Dargis and it's up to Garfield to save the day, that is if he can get his face out of the lasagne long enough.