Eun-yi is hired as a maid in a luxurious mansion owned by a wealthy businessman, who soon begins to seduce her, leaving her with little choice but to comply. As tensions rise, the women in the family begin to plot against Eun-yi, and she must navigate a dangerous web of manipulation and deceit. Forced to fight back with her own cunning, Eun-yi strives to protect herself from the complex and treacherous forces around her.