A small, secluded island off the coast of Belize suddenly finds itself terrorized by a deadly predator from the planet's distant past, when deep-sea divers accidentally awaken an ancient evil. Jackson Slate and his team of underwater cave explorers unearth much more than long-lost Mayan treasure while plumbing the depths of a world famous blue hole. They disturb a creature that's been hibernating for over 60,000 years - a rampaging behemoth of death and destruction not only at sea but also on land.