When his father offers him to the forbidden sea as payment for a billion-dollar empire, Noah Vale should have died. Thrown into the black tide beneath a storm, he meets Seraphine—the exiled Tide Queen, beautiful, ruthless, cursed by a poisoned ocean. Noah trades her the truth for his life: his father's Caldwell Group destroys her kingdom behind luxury resorts and lies. Bound by a sea pact, he returns with glowing tide marks and a queen at his back. His family called him useless; the sea calls him king. Now they will drown the empire in truth.