On the way to the Mexican beach resort of Cabo, a plane full of people plunges to the bottom of the Pacific Ocean in a horrifying crash. Now those who survived the deadly impact are trapped deep below the ocean's surface in an air-locked galley, with oxygen quickly running out. With no way out, the only way is up - but these are shark-infested waters and the killer great whites are circling the blood-stained sea hungry for fresh victims. One courageous young woman will be forced to step up and take on the impossible task of trying to get them back to the surface, alive and in one piece.