In a world where the color of one's blood determines their strength, Nell Fiala was born exceptionally weak. As a colorless girl, she always thought she'd die young. But her sister has a plan; to save Nell and herself from an early grave and a life of fear, she is willing to consume the hearts of those stronger than them. As a part of her sister's plot, Nell sets off with three powerful warriors: a woman with an invisible protector, a tall man ridden with guilt, and an ex-priest in a dark robe with an even darker past. To unite with her sister in a promised utopia, Nell has to be brave, cunning, and cruel. Although Nell is determined to follow the plan, her newfound freedom and companions may change everything. In the country she finds filled with demons, death, and a secretive religion, Nell must make a choice between her sister, her freedom, and her life.