A political marriage is arranged between Ezra Valentino, cursed heir of the feared Northern duchy, and Astelle Laurent, a Southern noble girl, to maintain peace between two nations divided by fear and prejudice. The North is seen as the land of “Devil’s Children,” shaped by harsh survival and a dangerous bloodline, while the South depends on them despite its fear. Forced together, Ezra and Astelle must navigate duty, distrust, and a fragile peace that may not hold.