An, a member of the swim club, was secretly dating the team's ace. She was living a fulfilling life both in the club and in her private time. However, she was caught on camera having sex with her boyfriend, and the footage began circulating among the other swim club members. It was a set-up blackmail scheme—who exactly filmed the video? With her weakness exposed, An succumbs to the sexual blackmail. As the threats continue daily, she is gradually turned into the swim club's sex slave. And waiting for her at the end was a shocking conclusion...