Ten thousand feet below the surface of the Pacific Ocean, in the deepest part of the Solanca Trench, a drilling team suffers a mysterious catastrophic accident. In an attempt to solve the mystery, the Prometheus Corporation turns to disgraced marine biologist Cloyce Witticker to find out just what went wrong. But what Cloyce discovers will change his life forever: an ancient creature never before recorded in human history, a new species so deadly that it makes humanity its prey.