After losing his mother at the age of five and his father at eleven, Lachish is left alone in a world that offers no hope. He grows up carrying a single purpose: to avenge his mother’s murder.
When a mysterious girl named Mallory enters his life, she offers him something he has never known power. She promises to accomplish what his physical body cannot and help him achieve the vengeance he desperately seeks. But her offer comes with one condition: he must love her and no one else. Desperate, broken, and blinded by what he thought was love, Lachish agrees to an oath, unknowingly binding their bodies into one.
However, Mallory has her own secrets. She never intended to help him she only wants to use him. What she did not foresee was the darkness buried within Lachish. The trauma he carries is deep, relentless, and far more dangerous than she thought. Instead of bending him to her will, Mallory finds herself trapped in a covenant she cannot escape.
When the line between hunter and prey begins to disappear, the curse meant to empower her threatens to consume her instead. With time running out, she must find a pure spirit a boy willing to surrender his innocence to her and take her place in the oath. If she succeeds, Lachish will be released into a new body and the curse transferred. If she fails, the darkness buried within him will consume her completely.