The Merias Realm. A world made up of four species: humans, beastfolk, beasts, and the undead. Four thousand years ago, the intelligent species of Merias learned that their world had nearly been destroyed. They were on the brink of being overrun by an army of the undead. Thanks to several powerful figures among the humans and beastfolk, disaster was averted. Under their leadership, they managed to repel the threat of the undead and reclaim their kingdoms.
When the dark age ended, only six of the heroes of old remained alive. They were the patriarchs and matriarchs of their respective families, and they founded the Six Families of Merias. Four thousand years later, those families still stand guard over the kingdom, protecting it from the undead. Their mission is to ensure that the world never again falls into the dreadful state it once suffered, placing every living thing in Merias at risk.
The Amarin family is one of the Six Families. Located at the northernmost tip of Merias, they continue to carry out their mission against the undead. Lia, born Amarin, is only just beginning to discover her powers, but as the youngest daughter of her family, she cannot escape her responsibilities. At first, no one knew that these responsibilities would affect not only the future of the Amarin family, but the future of the entire Kingdom of Merias...