When Kurt Austin is injured attempting to rescue the passengers and crew from a sinking yacht, he wakes with fragmented and conflicted memories. Did he see an old friend and her children drown? Or was the yacht abandoned when he came aboard? Determined to know the truth, he soon finds himself descending into a shadowy world of state-sponsored cybercrime, and uncovering a pattern of vanishing scientists, suspicious accidents, and a web of human trafficking....

In the Micronesian Islands, a U.S. government-sponsored undersea lab conducting research on a rare jellyfish known as the Blue Medusa disappears. At the same time, off Bermuda, a bathysphere is attacked by an underwater vehicle, its passengers--including Joe Zavala--left to die. Only Kurt Austin's heroic measures save them, but, suspecting a connection, Austin puts the NUMA team on the case. What they find is a hideous series of medical experiments,...