Three friends filming an audition tape for an extreme reality show, take part in shark cage diving, only to be left in great white infested waters, turning their recording into life and death.
A deep-sea submersible, part of an international undersea observation program, has been attacked by a massive creature, previously thought to be extinct, and now lies disabled at the bottom of the deepest trench in the Pacific with its crew trapped inside. With time running out, expert deep sea rescue diver Jonas Taylor is recruited by a Chinese oceanographer to save the crew – and the ocean itself – from this unstoppable threat: a pre-historic 75-foot-long shark known as the Megalodon.