Marine biologist Ken Murphy can tell there is something wrong with the ocean environment off the coast of Rhode Island. His observations lead him to a conclusion that he cannot believe--and won't believe until it's too late! Along with his colleague, a Coast Guard helicopter pilot, and crazy old man on a rendezvous with death, Murphy sets out to confront the beast that has uprooted the world around him--the massive, once-thought extinct shark known to science as C. Megalodon! Hungry, terrifying and fearless, the Megalodon is here!