Quin is the newest generation in a long, proud line of Knights, but he less than lives up to his legacy. To earn his knighthood and escape the looming disapproval of his father, he accepts a mission far in the North. There he runs into Arria, an ancient dragon newly awakened, and Keeva, a half blood dragon whose word is as dubious as her birthright. The violent encounter with Arria and her servants leaves Quin's mentor dead, and him stranded far from the safety of the Knight's Guild. Keeva is his only ally, but she has a past she cannot escape. Quin finds a kindred soul in Keeva, but their growing friendship holds danger as well as hope. Arria, her mate slain by Quin's ancestor, clings to the only thing she has left: grief-stricken revenge that threatens the survival of Knights and dragons alike. With Keeva's help, Quin must dig up a truth long buried and secrets that were never meant to be found. Both Knights and dragons need to fight together to defeat Arria, but in his attempt to unite these enemies, will Quin commit the ultimate sin for a Knight? To fall in love with a dragon.