A pleasure cruise in Paradise leads a group of friends to a shark-infested Hell... When Alex Simmons is invited to a college reunion in the Hawaiian islands aboard the private yacht of his old pal Harry Curtis, he is not sure what to expect. The two men had a falling-out years ago over the suicide of one of their friends. Could this be Harry's way of making amends? Or is something more sinister in store? The crew sets sail and arrives at Orchid Atoll, the site of a deserted former Coast Guard station. But they are far from alone... Out here, three hundred miles from civilization, Alex and his friends are about to encounter two very different brands of evil - one human, the other with fins - unlike anything they could have possibly imagined. They have entered a place where there's no law, no mercy. . . and no way out.