In the Micronesian Islands, a top secret, U.S. government- sponsored undersea lab conducting vital biomedical research on a rare jellyfish known as the Blue Medusa suddenly . . . disappears. At the same time, off Bermuda, a bathysphere is attacked by an underwater vehicle and left helpless a half mile below the surface, its passengers-including Zavala-left to die. Only Kurt Austin's heroic meas...