Vampires. Secrets. Open water.

Dr. Isla Hart believes everything—even magic—has a scientific explanation. Her deep-sea expedition was meant to prove her father’s wild theories and finally earn her place in the scientific world. Instead, it ends in blood, ruin, and a rescue that feels more like captivity.

Now she’s trapped aboard The Nocturne, a luxury submarine crewed by vampires and powered by secrets. Among them: Sebastian Moreau. Elegant. Dangerous. Undead. And maddeningly interested in her research… and in her.

Sebastian didn’t trade breath for blood to be tethered to anyone. But Isla’s data might hold the key to an ancient power stirring in the trench—and her presence aboard The Nocturne is awakening something else, too. Something more ancient than vampires. Something in the deep.

The deeper they dive, the more Isla’s blood, her past, and the artifact she’s been chasing begin to rewrite her. The woman who boarded the ship may not be the one who surfaces.

On a ship where no one tells the truth and trust is a sinking currency, desire may be the most dangerous current of all.

Perfect for fans of slow-burn paranormal romance, oceanic gothic adventure, and seductive danger with a bite of banter—closed-door, low-spice, slow burn intensity.