The boundary between Valemnia and Earth has been breached by demons. Although knights who go by the name Celestes have managed to take things back under their control, demons who escaped to Earth have to be hunted down.

When fate decided to turn at the wrong time, seventeen-year-old Valeriana Kerrigan ended up in the clutches of a demon she escaped from at a price—her choice. Her unfortunate involvement served as wind in her sail to leave neutral waters, hence, she reluctantly steps into the chaotic shores of a different world where the only way to leave and live is to enter and learn to fight.

Even so, Valemnia's problem with demons may take more than just learning how to wield a sword and getting along with its element-bending locals. To keep the boundaries strong between her world and the other, Valeriana would have to learn how to let go of her humanity. Literally.

But is this world worth losing it for?