Cousteau uncovers the shocking story of the worldwide extermination of sharks and learns that sharks have more to fear from humans than we do from them. The precipitous decline of sharks, long maligned as man-eaters, could affect many other species in the food chain, as Cousteau's investigation reveals. Cousteau's team members confront their own fears as they dive without the protection of shark cages, and, in a spine-tingling once-in-a-lifetime adventure, Cousteau is shown "catching a ride" with the great white shark.