A distress call in the Caribbean sends the NUMA team of Kurt Austin and Joe Zavala to a damaged freighter. But, instead of being greeted by a grateful crew, they are attacked by a group of paranoid, disoriented and deranged men lying in wait.

What has driven the crew to attack their rescuers?
Is it mutiny, madness, or something more sinister?

The answer leads Kurt and Joe to a cadre of Cuban mercenaries, and a plan to use modern airships to hijack a nuclear submarine. Faced with an dangerous enemy coming from the skies, this could be the NUMA crew’s toughest task yet . . .