Kennedy Waters lives in a world where vengeance spirits kill, ghosts keep secrets, and a demon walks among us - a demon she accidentally set free. Now Kennedy and the other Legion members - Alara, Priest, Lukas, and Jared - have to hunt him down. As they learn more about the history of the Legion and the Illuminati, Kennedy realizes that the greatest mystery of all does not belong to any secret order, but to her own family. With the clock ticking and the life of someone she loves hanging in the balance, Kennedy has to ask the question she fears most: what is it about her past that has left her Unmarked?