Manami lives with her older brother, Seiji, after losing both of her parents in quick succession. Realizing she can't keep relying on her brother forever, she starts working at a flower shop. While making a delivery, she spots a woman who looks exactly like Hitomi, a teacher from her alma mater who had suddenly vanished without a trace. Inside a suspicious bar, among the men surrounding Hitomi, is a face she recognizes... it is unmistakably her brother's boss. Manami consults her childhood friend and detective, Shuhei, but...