Rambunctious marmaduke moves with his family to orange county, where in a quest to be accepted by the cliquish pedigreed group at the dog park, he loses sight of who he really is and what's truly important until events force him to recognize value of his real friends and realize that he's in love with a tomboyish mutt rather than a stunning purebred; Meanwhile, his owner finally realizes how much he loves his dog, despite havoc he often wreaks.