Eun Su works in sales at a luxury goods retailer in a high-end department store. She has carried the weight of a deep-seated trauma since childhood. Her friend, Hui Su, shares a similar burden; both women haunted by the scars of their pasts. Hui Su was once a promising children's book writer, but her career has long since stalled. Now, she is trapped in a nightmarish existence due to the violent abuse of her husband, Jin Pyo. Desperate to escape his cruelty, Hui Su lives in constant fear, unable to break free from his grasp.

One day, Eun Su reaches a breaking point and decides to take matters into her own hands. She makes the life-altering decision to save her friend by ending Jin Pyo's life. Together, the two women devise a plan to kill him. As their plan unfolds, Jin So Baek, the powerful CEO of Jingang Firm, becomes aware of their intentions. Sensing an opportunity, he offers his support, becoming a strong ally in their dangerous mission. With his backing, the women feel emboldened, but their journey is fraught with peril as they navigate the dangerous path ahead.