Transmigrated into the body of Fiona, the notorious final villain, you inherit her cursed existence—an eternity of torment for a death yet to come. Cast out for her illegitimate birth, this noble girl suffered brutal family cruelty her entire life. Six years before the novel's timeline, war erupts suddenly, and conscription claims her at only thirteen years old. Fiona's redemption lies in a singular gift: unparalleled magical mastery. Monster hordes sweep across the land, yet surviving the battlefield seems insurmountable as exhaustion creeps closer. Then destiny intervenes. The male lead appears in her darkest hour, unexpectedly vulnerable. One truth becomes undeniable: his life shapes the world's survival. Between fate and choice, the path forward crystallizes—she must save him at any cost.