After watching the death of another mermaid, Nerida knows contact with humans is forbidden. She finds solace walking the shorelines and discovering trinkets from shipwrecks. One night she chooses to save a human instead of letting him drown. What she didn't expect was an unexplainable connection to the pirate and his lost treasure.

From an early age, Destan dreamed of sailing the open waters. While in service to the crown, an act of mutiny forces him to become a pirate. With a bounty on his head, he captains his vessel ahead of the hangman's noose. In the dark waters of the Caribbean, a storm brings him face to face with a mysterious woman. Who is this ghost of a woman walking the beach and singing with sorrow? Did she have anything to do with saving him?

Destan is determined to discover the answers to his questions while Nerida seeks knowledge about humans. As their worlds collide, outside forces threaten not only their connection but their very lives. Will being a pirate and mermaid destroy their futures? Or is their connection something more powerful?