Mitsuko Asatani, an assistant inspector from Tokyo Police HQ, has been assigned to Inunari Precinct as Toshio's partner, but she suspects him as the source of security information leaks. She also suspects Hitomi because of the perfume she uses. Meanwhile, Kacho undergoes treatment because of stress. Under surveillance from all sides, the Kisugi sisters must devise a way to outsmart Toshio's new partner and steal "Sunset of Rhine" at the same time.