Elara, the formidable Luna of the Blackstone Pack, is betrayed by her husband Damon and stepsister Selene—poisoned with wolfsbane, stripped of her mark, and framed for treason. Left for dead in the forest, she encounters Edith, a wolfless Northern princess who hands over her blood-mark, ring, and identity as she dies. Taking her place, Elara returns to reclaim the North as Princess Edith.