The plot of "The Housemaid" revolves around Millie Calloway, a young woman recently released from prison who is desperate for work. She secures a position as a live-in housemaid for the affluent Winchester family, where she quickly discovers unsettling dynamics. The matriarch, Nina Winchester, initially appears warm but soon reveals erratic and controlling behavior, leaving Millie feeling trapped and psychologically tormented. Meanwhile, Millie becomes embroiled in an affair with Andrew, the charming yet manipulative husband. As the story unfolds, the narrative shifts perspectives, revealing Nina's own harrowing experiences of abuse and manipulation at Andrew's hands, including being locked in an attic as punishment for perceived misbehavior. The tension escalates when Andrew attempts to imprison Millie in the same manner, but she fights back, ultimately leading to a violent confrontation. The climax sees Millie reversing the roles of victim and abuser, culminating in Andrew's death. Nina offers to take the blame for his murder, suggesting a complex interplay of manipulation and survival. The epilogue hints at Millie's new role as a protector for another woman in a similar situation, suggesting themes of cyclical abuse and empowerment in the face of trauma.