Nick Ayres wanted to be the first man to explore all of the Caulkers’ Giant Cave, the largest underwater cave in the world. Instead of fame and fortune, he found death at the hands of something that defies science, accidentally unleashing it on the island’s unsuspecting population.

Gabriel Robles is the man hired to take care of the monster. He knows the water and its inhabitants better than anyone else, but he's never faced something so deadly. Robles has to figure something out quick, because the victims are piling up and it’s only a matter of time before the blood in the water becomes a problem for all of Belize, maybe even the world.