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.

Billy Forsetti has grown up poor, desperate and angry. His best friend, Mikey, has taught him how to steal and fight his way through life. Add a couple of friends, and introduce the world of carjacking-amateurs seeking thrills and cash-it all leads to an intoxicating time. But when Mikey and Billy's values collide over where to draw the line, Mikey explodes and Billy finds himself estranged and wanting to move on. Billy takes up with a beautiful girl and finds a more promising life. But when a carjacking goes wrong, his past becomes a shadow that darkens and threatens his future. Mistrust, jealousy and fear will chase Billy down a rabbit hole that might leave him no way out.

Five years ago, expert sea diver and Naval Captain Jonas Taylor encountered an unknown danger in the unexplored recesses of the Mariana Trench that forced him to abort his mission and abandon half his crew. Though the tragic incident earned him a dishonorable discharge, what ultimately cost him his career, his marriage and any semblance of honor was his unsupported and incredulous claims of what caused it - an attack on his vessel by a mammoth, 70-foot sea creature, believed to be extinct for more than a million years. But when a submersible lies sunk and disabled at the bottom of the ocean - carrying his ex-wife among the team onboard - he is the one who gets the call. Whether a shot at redemption or a suicide mission, Jonas must confront his fears and risk his own life and the lives of everyone trapped below on a single question: Could the Carcharodon Megalodon - the largest marine predator that ever existed - still be alive ... and on the hunt?

Things take a turn for the worst when a small town family finds an abandoned door in the woods. Is this just an abandoned door, or a gateway to something so dark no one sees coming?