We know more about other planets than we do about the world at the bottom of our own oceans. Marine Biolgist Michael Armitage is recruited to investigate an emergency at a secret military research facility, deep in the Kermadec Trench, 18,000 feet below the surface of the Pacific Ocean. Now trapped with a squad of Marines and the few survivors, they must fight to survive and discover the terrifying secret that lurks in the darkness of The Trench.