Idra, the daughter of a wealthy Radius family, spends her days alone and lonely, not fitting in with her stepmother and younger sister. Her younger sister Falsa's plot leaves Idra in a deep misty forest, and in order to escape the demons that attack her, she breaks the seal of the evil spirit Algeo...?

A dark fantasy love story that unravels the past between an innocent and merciless evil spirit and a girl who has grown used to not being loved.