Being weak is not tolerated in the vicious Nightfall Pack, which is led by the ruthless Alpha Raph. Lyra has been called weak since birth. She is a slave who is invisible and degraded, born into a tainted lineage that is known for producing little wolves. The pack is shocked to learn during the mating ceremony that her fated partner is Demon, the Alpha's illegitimate but powerful son. In an attempt to gain respect and get his father's approval, Demon openly rejects her, breaking her heart and their sacred bond. But she is not ruined by the rejection.Lyra's repressed wolf wakes as opposing Blood-fang Pack troops engage in combat, exposing a long-thought-to-be-extinct Moonblessed heritage. Demon struggles to establish his leadership abilities, but he eventually comes to the realization that had turned down the most rare and powerful wolf to a chance to change the pack. The rightful heir, Kael, on the other hand, controls affairs covertly and even conspires with adversaries to destroy Demon. When Lyra is falsely accused of treason, Demon is forced to choose between love and ambition He picks her. Their revolt against corruption sets off a bloody battle trial that reveals Alpha Raph's harsh test and Kael's treachery. However, victory has a price: the Nightfall pack could be wiped out by an invading army. The pack is saved and its future is altered in the last battle when Demon's Alpha strength combines with Lyra’s Moonblessed power. Demon becomes alpha via sacrifice rather than domination. Lyra transforms into Luna via equality rather than servitude. The rejected mate turns into the pack's greatest asset as they start a new era together, one in which bloodlines are redeemed, power is redefined, the era of slaves was put to an end and Lyra stood strong with Demon by her side.