After deadly sharks start mysteriously attacking an oil rig in the Gulf of Mexico, the U.S. military calls in experts Dane Quatrell (Lorenzo Lamas) and Robin Turner (Simmone Mackinnon). They soon find themselves in a secret sub, tasked with helping the Marines eliminate the predators. But things begin to look fishy, and Dane and Robin realize the facts aren't as simple as they seem in this action-packed thriller.