Hana lives with her daughter and son-in-law, struggling with inner turmoil in her daily life. She is frequently disturbed by the sounds of the couple's intimacy, often waking up in the middle of the night. While it's natural for the young couple to enjoy their marriage, witnessing their passion becomes an uncomfortable trigger for Hana, leading her to secretly masturbate after catching glimpses of their lovemaking. Plagued by guilt and self-loathing, her emotional state takes a turn when one day she discovers her son-in-law masturbating alone in the living room. Unable to resist, she seduces him and begins a secret affair. A few days later, her daughter announces she is pregnant—an occasion for celebration—but Hana now yearns deeply to conceive the son-in-law's child as well...