Jeongha, who has always been of fragile health and struggled with infertility, meets Hyeon, a maid brought by her mother-in-law to act as her husband's surrogate. Feeling intrigued by Hyeon, who is 12 years younger than her, Jeongha offers her a room and begins to take care of her... Despite their initial tension, Hyeon starts to feel unfamiliar emotions towards Jeongha, who takes care of her despite her cold demeanour... Where will this relationship, initiated by Jeongha's whims, lead?
