Cole Marlowe finally has what he a quiet life in Montana with Mara at his side. It doesn't last. A new player has risen from the wreckage of Draško's network — a cold, patient strategist known only as the Cartographer — and he's selling something worse than a LEVIATHAN, a system that can hijack any ship's controls and stage a naval "accident" on command. When the demonstration nearly triggers a war at sea, Marlowe is pulled back into the field alongside Reyes, tech specialist Priya Nair, and old friend Marcus "Bear" Okafor. The trail runs from Portsmouth to Naples to a private superyacht in the Mediterranean, where the auction — and the endgame — is about to begin. This time, the enemy isn't just outside the Agency. He's inside it.