Eun-yi is hired as a nanny in a lavish mansion by businessman Hoon and his very pregnant wife, Hae-ra. When Eun-yi is seduced by the father of the house, she becomes the unwitting victim in a serious of traps laid by the women of the house - Hae-ra, her villainous mother, and their seemingly loyal but increasingly bitter housekeeper. Eun-yi must outwit them and escape their schemes to protect her sanity..
