Swallowed by the Sea, Part One: Mr. Stern's Island

When their yacht sinks in a storm, Caroline and Alex, daughters of billionaire Charles Pennington believe they are about to be swallowed by the sea. At the last minute, they along with their tutor, Karen Andrews are miraculously rescued by a submarine. Or were they rescued, after all? All three women find themselves captives of the mysterious Mr. Stern, who has been plotting revenge on Charles Pennington for many years, and plans to use Alex and Caroline in his schemes. He also intends to make the two girls suffer for their father's sins, and train them train them to satisfy his sadistic sexual needs.