Restia Jarvinen, a young woman with a secret adopted status, is thrust into a world of intrigue and deception. Rejected for marriage due to an unsightly birthmark and a lack of magical prowess, she is deemed unfit for noble alliances. To salvage her usefulness to the family, the Duke, her adoptive father, orchestrates a plan for her to infiltrate the ranks of their enemies as a spy. Determined to prove her worth, Restia navigates a treacherous path, where loyalty is tested, and her resolve is put to the ultimate test. Amidst her mission, Restia encounters the enigmatic bastard prince, Aeldren Ladarion, and the talented high-ranking noble, Isengrim Zyair.