This tells the story of Riska, a woman determined to seek revenge against a family blamed for her mother's ruin. To execute her plan, Riska infiltrates the family by disguising herself as a maid. However, the revenge that initially seemed so clear-cut becomes increasingly complicated as Riska gets to know the family more closely. Gradually, feelings of sympathy and internal conflict begin to mix with her original intention. More terrifyingly, Riska also uses black magic to carry out her plan. But once that dark power is summoned, something unexpected happens as the entity seemingly refuses to let anyone go easily.
