Lee Han's life was going nowhere until he received an offer too tempting and dangerous to ignore: "Get close to the women in this building! Seduce them, romance them, blackmail them, whatever method works." Lee Han is thrown into a risky game of secrets and seduction, where every woman has a weakness and finding it might completely change his life. "I need to start with the married woman at unit 301, Han Soojin, and find her weakness quickly!"