The sea holds many secrets, but none as deadly as the Siren Queen Thalassa and the shadowy criminal network known as the Red Hand. For Captain Selene Greystorm, survival means making dangerous alliances. After years of seeking revenge against the pirate Darian Thorne, she finds herself fighting alongside him to stop the world from being consumed by darkness.

As the Siren Queen rises and ancient magic sweeps across the ocean, the Red Hand, led by the ruthless strategist known as the Scorpion, tightens its grip on the underworld. Their use of forbidden sorcery threatens to shatter the balance between land and sea. With the Scorpion manipulating events from the shadows, Selene must navigate not only the deadly waters but also a web of betrayal and deception.

Selene and Darian venture into cursed territories where monsters of both magic and men await. But can they stop the Red Hand and Thalassa before the world is drowned in blood?

With danger closing in from all sides, Selene will have to face the hardest decision of her life: trust her greatest enemy or lose everything she holds dear.