Ever since scruffy Sebastian Smith and Lady Thea Flamma were paired as Dragon Riders, their lives have been forever changed. The unlikely duo forged an unbreakable bond, but now with dark stirrings in the south their bond will be put to the ultimate test. Seb discovers Lord Vincent has returned and he wants to unleash an ancient evil that will destroy the lives of everyone in the kingdom - The Darkening. In order to defend the realm against unspeakable foes, Seb, Thea, and their shared dragon, Kalax, set out on an arduous journey to find the sacred Dragon Stones - before their dark power ends up in the wrong hands. But to conquer an old enemy, Thea must find a way to overcome her own inner demons, and Seb has to muster the courage to become the brave leader his kingdom needs . . .