Sonoko is writing a script for a play. In her script, there's a murder case, and high-school detective Suzuki Sonoko is there to help solve it. Haibara finds flaws in the deduction section of the plot, and Ran decides to call Shinichi for help with the script.

After watching a video concerning Rena and Eisuke, Conan contemplates if the two could really be related after learning they have different blood types. He informs Jodie of what he learned, and considers that the Black Organization could be using Eisuke without him realizing it. Elsewhere, Shuichi Akai watches over Kir in the hospital which reminds him of a similar accident involving him and Shiho's older sister Akemi. The next day, Conan and the gang pay a visit to a mansion where Eisuke's deceased mother used to work to retrieve her effects, while Kogoro is introduced to an unsolved murder case.