Shinogawa Shioriko (Ayame Tsuyoshi) receives a call that she and Daisuke Goura (AKIRA) have a special consultation regarding old books, and they come to the Western-style house where Keiko Raijo (Mio Takagi) lives. Instead of Keiko, who is in a wheelchair, Shioriko and Daisuke are greeted by her sister, Kuniyo (Miyuki Matsuda), who shows them to a storeroom filled with a collection of old books by Edogawa Rampo.