What do the Phoenix Islands in the Pacific Ocean, the Wadden Sea in the North Sea and Cocos Island National Park in Costa Rica have in common? These are just three of the 43 exceptional marine places inscribed on the World Heritage List and protected under UNESCO's World Heritage Convention. You'll get a peek at some of the crown jewels of our oceans and learn about UNESCO's Marine World Heritage Program.
Millionairess actress-singer Marie Coleby (Deborah Coulls) lives in a luxurious villa on a deserted beach. One afternoon following a TV commercial shoot at the villa she incites gardener Gordon Mason (Chard Hayward) to mayhem and murder. The unexpected arrival of Marie's sister Jenny Nolan (Louise Howitt) hinders Mason's attempts to dispose of the body. He then decides to kill Jenny. But she is equally determined to stay alive ... so begins a battle of wits. Jenny's salvation seems at hand when two security men arrive at the villa, but only one, Officer Collings (Roger Ward) survives the initial siege. Then Jenny is alone to face Mason for the final time ...