City boy, Mike Beldon arrives in Corel Key with a huge chip on his shoulder about his mother's new husband. However, a near death accident helps him see his new step-father in a different light.

Sandy, Bud and Flipper decide to become detectives when reports claim that someone has been looting boats in Coral Key Park.

Things take an ominous turn for Sandy and Flipper when the plane carrying them to the Bahamas crashes in the Ocean.

Flipper is the only hope of saving Sandy from drowning in a plane that crashed at sea, in the conclusion of this two part adventure.