On a NUMA training mission in the Caribbean, Kurt Austin & Joe Zavala catch a distress call from a nearby freighter. Going to help, they locate a damaged vessel & a incapacitated captain clutching a shotgun. While searching the freighter for clues, Kurt and Joe are ambushed by crew members who seem terrified & disoriented, almost brainwashed by "baffling lights" that circled the ship. Soon, they’re confronting Cuban mercenaries who plan to use modern airships, & a cutting-edge weapon to hijack a nuclear submarine, culminating in a life-or-death showdown in the skies.
