A woman and her husband become the target of their fertility doctor.

Survivors escape to a deserted atoll, after their boat during a Semester at Sea ship is sunk by a mutated two-headed shark. But when the atoll starts flooding, no one is safe from the double jaws of the monster.

Just when you thought it was safe to go back to the beach, it appears that our large fishy friends have found a way to chomp on you when you're chilling out on the sand too!