When Evie Everheart miraculously survives a fire on a first date with her lifelong crush, her angelic rescuers tell her she's been touched by a demon prince and now bears his dragon burn, marking her as one of his own, To save herself from eternity as his slave and her family from his lethal touch, Evie must leave home to train with Sentinel warrior angels as she walks the thin line between the planes of existence.

The Mark changes her in unimaginable ways, bringing with it a lethal elemental gift, but is it enough to keep her loved ones safe and survive the demon prince hunting her before he tears her world apart?