About to be divorced because of her infatuation with Kelcey Barton, Carol Lockwood is persuaded to take one last vacation cruise with her husband, David. They find that Kelcey is a fellow passenger. Their ship is wrecked; and Carol, David, Kelcey, and Smith, who is also in love with Carol, are cast up on a desert island. All vie for Carol's attention, but she shows no favoritism. After David swims through shark-infested waters to bring her protection, Carol realizes she still loves her husband. Kelcey and Smith unite against David, but their efforts are foiled by a volcanic eruption, a tornado, and the arrival of a rescue ship.—AFI