he lays with his wife and gives Miss Cho piano lessons. Back at the factory, Miss Cho learns that her friend has committed suicide after being fired, due to being overcome by pressure of not being able to secure a new job. In an emotional state, Miss Cho confesses later that day to Mr. Kim during their piano lesson that she was actually the one in love with him, not her friend. Miss Cho then attempts to fling herself at Mr. Kim, who rejects her due to being married to Mrs. Kim. Mrs. Kim is away at her parents during the entire ordeal. In the aftermath, Mr. Kim becomes incredibly stressed, and the housemaid Myung-Sook has watched this entire encounter from afar. Myung-Sook then uses this as her opportunity to make a move, seducing him. In his emotional state, Mr. Kim succumbs to her and the two engage in an affair. Myung-Sook proceeds to feel ill as the weeks pass, revealing her pregnancy by Mr. Kim. Mr. Kim eventually has to come clean to his wife, and despite her initial depression over being cheated on, she devises a plan which requires Myung-Sook to thrust herself down the flight of stairs which lead to the second storey. As their housemaid, Myung-Sook is forced to agree to this, and it successfully results in her having a miscarriage. After this incident, the housemaid's behavior becomes increasingly erratic. She threatens to kill the composer's newborn son. Mr. Kim fights her off as she tries to grab at the baby. Myung-Sook then offers Mr. Kim's other son water, and tells him that she has poured rat poison into it. As she tells him this, he further panics and falls to his death down a flight of stairs. Myung-Sook later states that it was just normal tap water. Instead of turning her in to the police, Mrs. Kim offers to support Myung-sook in order to keep her from losing her job, telling Myung-Sook she can have anything she wants; Myung-Sook then asks to have Mr. Kim. She forces him to move upstairs into her room while Mrs. Kim labors over her sewing machine, falling asleep at her work every day. Unable to stand their new arrangement, both the wife and daughter attempt to poison Myung-sook, but she outsmarts them. Finally, Myung-sook persuades Mr. Kim to commit suicide with her by swallowing rat poison on the grounds