Choi Bora, Jeon Do-yeon, works at an English language institute and is entangled in an affair with Kim Il-beom, Joo Jin-mo. Her husband, Seo Min-ki, Choi Min-sik, a former banker, has lost his job and has taken over all the domestic duties—cooking, cleaning, and watching their baby—while he quietly consumes soap operas and romance novels in his free time. He knows Bora is unfaithful but seems willing to endure the infidelity for the sake of the family, expressing a longing to see Bora become a good mother to their infant daughter. This tension between love, loyalty, and betrayal threads through the everyday rhythm of their lives.
Min-ki tries to cling to a sense of stability, telling Bora that he would be happy if she could be a good mother, a line that underscores the fragile balance they’re trying to maintain. Bora grows disturbed as Il-beom pushes the affair further, sometimes showing up at her doorstep and dialing the risk of exposure up a notch. In a desperate moment, Bora makes a drastic choice involving her own child, and Min-ki, finding the toddler alone at home, rushes the child to the hospital, an event that shatters any remaining illusion of normalcy.
The film then spirals toward its conclusion with a chilling twist: Min-ki appears to depart by train with a female friend from the building, but he actually returns to the apartment, where Bora is murdered and Il-beom is framed for the crime. A neighbor discovers Bora’s body, and the mounting suspicion, aided by planted evidence, leads the police to lean toward Il-beom as the killer. The drama leaves the viewer with a mounting sense of ambiguity even as the truth seems to bite back at those who believed they understood what happened.
Director Jung Ji-woo adopts an observer’s stance, often using handheld cameras to follow the lives of the three central figures in a matter-of-fact, almost documentary-like cadence. The result is a portrayal that is intimate and unflinching, layering the ordinary with the dangerous undercurrents of desire, obligation, and consequence. The film is explicit in its portrayal of sexuality and contains one scene of brutal violence, marking a stark contrast to the calmer surfaces of daily life.
Despite its veneer of possible closure and the echo of “Happy End” themes, the narrative remains unsettled, resisting a tidy or conventional resolution. It invites viewers to dwell in the fragility of imperfect relationships and the costs of keeping secrets, offering a morally shaded, non-optimistic, yet not entirely hopeless, cinematic experience.