'Suddenly I was back in the blurry green undersea world. And the shark was there, too. Coming straight at me. Fast!'
Sam Fox is on holidays at the Great Barrier Reef when he and a young Japanese tourist are swept off a coral shelf by a freak wave. Before they know it, a strong current has pushed them out into open water. First Sam must fight to keep himself and his new friend from drowning; then, as night falls over the inky black ocean, the underwater predators start moving in . . .