Sandy Ricks is sent by his mom to Coral Key, a rustic island in the Florida keys, to spend the summer with his uncle Porter Ricks. Sandy dislikes everything about his new environment until a new friend comes into his life, a dolphin named Flipper, that brings uncle and nephew together and leads Sandy on the summer adventure of a lifetime.

Visitors to a remote island discover that a reclusive Nazi commandant has been breeding a group of zombie soldiers.