Princess Lira is the most dangerous killer in the middle of the sea abyss. The hearts of seventeen young men are trophies, thanks to which she is revered in the womb of the sea. When she suddenly kills one of the sirens, her mother, the queen of the seas, turns Lira into the creature she despises the most, a human. In order to become herself again, Lyra must win for her mother the heart of Prince Elian, a siren hunter. The prince considers the ocean his home, despite the fact that he is the heir to one of the most powerful kingdoms in the world. For him, hunting sirens is a duty. But saving a young woman in sea, Elion had no idea who she really was. Lyra promises to help him finally destroy the sirens, but can he trust her? Who among them will be the winner in this battle? The book will not leave anyone indifferent, neither a romantic adventurer nor a thoughtful connoisseur stories about the growth of the human soul.