​Levina, a powerful wyvern, has lost everything. Her mate has been murdered, and the final piece of their love, an unhatched egg, is stolen. Driven by grief and a mother's fury, she sets out to reclaim what is hers, ready to unleash her fury upon the human kingdom.​ Meanwhile, a human knight, the brother of Elara, purposely steals the unhatched egg, believing it to be a beautiful gem fit for his sister and her son. Burdened by a dark past and living a quiet life with her young son, Elara feels an undeniable connection to the mysterious gift. A desperate alliance is forced between her and the enraged wyvern, the creature she was taught to fear.​ Now, bound by their connection to the mate they both lost, and a powerful mate bond, the two women must navigate a treacherous world of courtly lies and ancient secrets. But when the knight is forced to choose between the King who controls his life and the sister he loves, all three must decide where their true loyalties lie in a war that will either unite them or destroy them all.