Yuri, who belongs to the 6th section of the Investigation Bureau dealing with economic crimes and intelligence crimes, is a new investigator who is still inexperienced. She volunteered for the first undercover investigation this time, and she was Yuri, but her infiltration destination is an organization rumored to be involved in a drug-related case. Yuri, who dressed as a guest of an esthetic salon run by an organization, tries to infiltrate alone.