Set against the backdrop of 1930s Korea, before the onset of World War II, the story unfolds with a local woman named Sook-Hee [haesuk-kim] preparing for an important move. She is destined to serve as a handmaiden to the Japanese heiress, Lady Hideko [minhee-kim], at her sprawling estate nestled in the countryside. Upon her arrival, Sook-Hee is greeted and given a tour, which includes an annex transformed into a library filled with rare and valuable books. The lady of the house, who affectionately begins to call her Tamako, tells Sook-Hee that she will not be sleeping in servitude quarters, but rather close to her in the main house.
As night falls, Sook-Hee wakes to Lady Hideko screaming from a nightmare, revealing a haunting past involving her aunt's ghost. She comforts the heiress, showcasing her dedication as a handmaiden by soothing her with sake and lullabies. However, Sook-Hee has an agenda of her own as she reveals through voice-over that she is not merely a handmaiden but a skilled pickpocket named Sook-Hee, raised by someone who taught her the art of deceit.
In a flashback, we discover the dark truths behind the house she now serves. The estate has a history of taking in abandoned infants and selling them off. Count Fujiwara, a man with nefarious plans, wishes to marry Lady Hideko for her fortune, intending to declare her insane and claim her wealth. He manipulates Sook-Hee into being the instrument of this plan—her task is to convince Hideko to fall in love with him. In return, Sook-Hee is promised a handsome reward, but she demands more than the count is willing to offer.
As Sook-Hee settles in, she experiences the dynamics of the household, and the unease of her new environment begins to surface. The staff’s antics, including stealing from her, irritate Sook-Hee, yet she remains enamored by Lady Hideko's beauty. Under the pretense of being a loyal maid, she uses a fake reference letter, a forgery at the hand of Count Fujiwara [jinwoong-jo], to cement her position.
While attempting to win over Lady Hideko, Sook-Hee soon realizes the depths of her affection towards her, blurring lines between manipulation and genuine feelings. Sook-Hee’s growing attachment becomes complicated as she witnesses Lady Hideko’s interactions with Count Fujiwara. The two women share intimate moments that deepen their connection while Sook-Hee grapples with her role in this deceptive game.
As tensions escalate, Sook-Hee initially finds herself torn between her growing feelings for Lady Hideko and her obligation to carry out the Count's scheme. The emotional stakes rise when romantic encounters culminate in the two women’s shared experiences, now marked by intimacy and affection.
Yet, as each plan unfolds, ulterior motives are revealed on all sides. Count Fujiwara and Lady Hideko engage in an intricate dance of deceit, with Sook-Hee’s loyalties tested amid a whirlwind of betrayal and newfound love. Eventually, the wheel of fortune turns, leading to a confrontation between Sook-Hee, Lady Hideko, and their adversaries, resulting in shocking truths that challenge their survival.
The film captures a story of love, betrayal, and the quest for freedom, highlighting the struggles of two women trapped in a world where societal constraints and personal desires collide. Through elaborate plotting and intense emotional exchanges, they ultimately seek liberation, culminating in a bold choice to escape their oppressive circumstances. As the narrative reaches its climactic end, we witness Sook-Hee and Lady Hideko embarking on a new journey, free from their past, but forever intertwined in a love forged against all odds.
