While cleaning her son's room, a mother accidentally discovers his hidden collection of underwear. Having recently heard rumors of a local underwear thief, she begins to suspect her son and decides to search his room while he is away. However, her son returns home unexpectedly, catching her in the act. Offended by her intrusion, he forcibly tries to stop her. After that incident, the son repeatedly takes advantage of his father's absence to pressure his mother. Their relationship begins to shift beyond mere parent and child, spiraling into a whirlpool of forbidden emotions.