Nakanishi Aruno is disliked and bullied by other Nogizaka46 members because she's different from them. After one of them lock Aruno and tell her to not come back, she decides to come back definitely.
Genshiro Kusaka, who runs a detective business in the Edo city, had a contract with Shinigami Juran. A "prostitute serial murder case" occurred at the Great Yukaku in Yoshiwara. How does both Genshiro and the Shinigami gonna solve it?