Kurt Austin faces mind-control technology and cutting-edge weaponry in the latest novel in the #1 New York Times-bestselling series created by the "grand master of adventure" Clive Cussler. On a NUMA training mission in the Caribbean, Kurt Austin and Joe Zavala catch a distress call from a nearby freighter. Leaping into action, they locate a damaged vessel and a dead captain clutching a shotgun. While searching the freighter for clues, Kurt and Joe are ambushed by crew members who seem terrified and disoriented, almost brainwashed. The trawler they were hauling has vanished, taken-the men say-by baffling lights that circled the ship. Kurt and Joe deduce that the men are suffering from Havana Syndrome, which deepens the mystery and raises the stakes. Soon, they´re confronting Cuban mercenaries who plan to use magnificent modern airships to hijack a nuclear submarine-culminating in a life-or-death showdown in the skies.