Lillian Hawe, the Shadow Assassin, is infected with the Heart-devouring Poison. Her only cure lies in forming an intimate bond with Ethan Thorne, the emotionally detached heir to the Thorne Family. Returning to the Hawe Family, she takes her sister Sissy’s place in their marriage alliance, plotting to heal via their intimacy. Yet as they live together, unexpected affection blossoms between them...