"This is the last chance !! Reiko, ask ..." Reiko, who had been married and retired from the undercover investigator, will infiltrate the casino where an organization is lurking again as an investigator at the request of her husband. Reiko tries to make contact with Sagawa, an executive of the organization, pretending to be a customer, but she does not reveal her true identity. Reiko has a collaborator man arrange an opportunity to come into contact with Sagawa, but that action is also out of the question for Sagawa. And Reiko, who was alone with Sagawa in one room of the hotel, came to know the true appearance of Sagawa there.