The movie is based on the true story of Ray Boundy. In 1983, the fishing boat where he was traveling in, along with his friend Dennis "Smurf" Murphy, 24, and his girlfriend Linda Ann Horton, 21, the boat's cook. The New Venture, capsized, sending the trio into the shark infested waters near Twonsville, Australia. They surfboards to stay afloat and swim to Lodestone Reef, where they hoped to be rescued. But before reaching their destination they realized they were being hunted by a 15 foot long Tiger shark. The shark attacked Murphy first, taking his leg, in an act of sheer courage and gut wrenching valor he swam while bleeding profusely from his wounds to lure the shark away from his friends, he succeeded, the shark went after him and killed him. Two hours later the killer shark came back and took Linda, who died while holding Boundy's hand before being dragged underwater. Boundy was able to finally reach shore, but not before being stalked and attacked by the shark, although he was lucky that rescuers were able to save him just in time before becoming victim No.3 in this tragedy. He was the lone survivor.