She found two billion dollars in sunken gold. He found her. Dr. Marina Vance spent fourteen months decoding a three-hundred-year-old Spanish cipher to locate the San Miguel — a legendary galleon lost in the Atlantic with a fortune in colonial gold. She never expected what came next. Captain Kaelen Cross — rogue mercenary, betrayed naval commander, ghost of the deep — surfaces beside her research vessel, takes her data, and drags her aboard the Leviathan, a stolen black-ops submarine. He doesn't want the map. He wants the mind that made it. Sealed inside a steel hull at a thousand meters, Marina has no sun, no rescue, and no way out. The corridors are narrow. The crew is dangerous. And a cartel submarine armed with torpedoes is hunting them through the darkest trench in the Atlantic. Kaelen controls her oxygen, her depth, her survival. But Marina controls the only thing he needs — the cipher that leads to the gold. As the pressure builds and the ocean closes in, the line between captor and protector dissolves in red-lit corridors and whispered commands. At the bottom of the world, trust is the most dangerous currency. And Marina is about to go all in.
