Medusa

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 attached 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 measures save them from a watery grave, but suspecting a connection, Austin puts the NUMA team on the case. He has no idea what he's just gotten them all into. A hideous series of medical experiments ... an extraordinarily ambitious Chinese criminal organization ... a secret new virus that threatens to set off a worldwide pandemic. Austin and Zavala have been in tight spots before, but this time it's not just their own skins they're trying to save - it's the lives of millions.