Its appetite is ravenous. Its teeth scalpel-sharp. Its power unstoppable as it smashes the steel doors holding it in a Monterey Aquarium. For the first time, the captive twenty-ton Megalodon shark has tasted human blood, and it wants more. On the other side of the world, in the silent depths of the ocean, lies the Marianas Trench, where the Megalodon has spawned since the dawn of time. Paleo-biologist Jonas Taylor once dared to enter this perilous cavern. He alone faced a MEG and cut its heart out. He still wears the painful scars of that encounter. Now, as the body count rises and the horror of a monster's attack grips the California coast, Jonas must begin the hunt again. But to do that means returning to the dark terror of the trench...where the MEG is waiting. Using himself as bait, Jonas will enter the ultimate battle--a fight to he death between man and beast in the darkest recesses of the ocean, and a fight for sanity from the depths of this own tormented soul.