The Bone Witches have spent centuries transporting the dead, a dangerous duty that requires the sacrifice of their amoureux, the men destined to love and die. However, Ailesse, Sabine, and Bastien are trying to forge their own path and rewrite the rules of the afterlife as they attempt to break the soul bonds that have caused so many deaths, including Bastien's father. Sabine struggles to maintain her authority as matron of her famille, a role always meant for her sister, while battling the violent power of the jackal within her. Bastien faces a new dilemma when spirits from the Underworld threaten the souls of his friends... and his father. Ailesse tries to resist her mother's siren call as she’s dragged into her own version of the Underworld. How will she save her friends when she is cut off from everyone?