When the children head to the local shelter to pick out a new pet, their parents expect them to bring home a fancy dog. Instead, the children fall completely in love with an old, scruffy, ordinary looking mongrel named Courtney. The parents are disappointed because Courtney looks like the kind of dog nobody else wants. But they soon discover that you can never judge a book by its cover. Courtney is actually a brilliant wonder dog hiding a massive secret. Much to the shock of the entire family, this scruffy rescue dog knows how to cook delicious meals, juggle objects in the air, and even play beautiful music on the violin. Just when the family starts to realize how lucky they are to have him, Courtney mysteriously packs his trunk and disappears. Find out what happens when the most talented dog in the world leaves home to go on a secret mission.