Imamiya (Fumino Kimura) is a detective who deals with fraud and scam cases. She arrests Kaji (Mahiro Takasugi), who is involved in a voice phishing case. Imamiya and her colleagues do not know who is at the top of the voice phishing group. Detective Tezuka (Kenichi Endo]) suggests that they should let Kaji walk free and see if he will lead them to the top of the group.