When Pyo In Sook was a child, her parents abandoned her with her grandmother who raised her. Her life has never been easy or comfortable. She now works at a public bathhouse scrubbing customer';;;s bodies. Her defense mechanism is to not express her feelings to other people. One day, a doctor tells her she has a terminal illness and will die soon. Even coming face-to-face with her own mortality, In Sook remains emotionless. She begins receiving care at a hospice and meets two women with lives very different from her own: Seong Mi Do, a social media influencer, and Kang Se Yeon, an ordinary housewife who feels lonely and taken for granted. One rainy day, In Sook meets Min Woo Cheon, a contract killer who works at a private detective office. Woo Cheon';;;s cool exterior masks a deep sadness. Each of the three women decides to end the life of one person who has done them wrong before they die, but in becoming friends, their anger begins to subside. When In Sook and Woo Cheon develop feelings for each other, though, she begins to rethink her plans.