In Showa-era Tokyo, no case is too large, or small, for Japan's first female detective, Mitsuko, and her assistant, Saku, who also happens to be heir to Yoshida Department Store! The sleuths meet a young blind man and his sister, who have a very personal mystery to solve—they want to know how a film they saw in their youth ended, but their memories of the story and even the voice of the benshi narrator differ radically! Can sound, vision, and memory be reconciled before it is too late?!