CARCHARODON MEGALODON The largest and most fearsome predator to have ever existed on our planet. Rumors of its existence in our modern oceans have persisted for centuries. Now, in a new adventure, the rumors explode into brutal and terrifying reality. BARANOF ISLAND, GULF OF ALASKA, 1952 Jim Granger is searching for a place of legend. Known as 'Bad Water' by the island's elders, it's reputed to be home to many dangerous creatures. Through a seam in a cliff face, Jim finds what he seeks. He also finds, too late, that the water demon he was warned about is horrifyingly real. TODAY Cate Granger is following in her grandfather's footsteps. Along with a team of scientists and crew, she accidentally releases a creature from Earth's primordial past into today's oceans. The giant Megalodon shark follows its instinct and a genetic memory of a home that once existed millions of years ago along the Californian coast. Nothing is safe on or below the water as the monster stakes its claim on the world's oceans. Now Cate and her team must do battle with a creature that has no rival, knows no fear, and regards humans as nothing more than prey.