The Phantom Thief Kid sends a notice to Jirokichi Suzuki announcing he plans to return three stolen artifacts belonging to Sakamoto Ry?ma: the letter, a cup with Ry?ma's blood, and the pistol; during the Ry?ma exhibition. Jirokichi persuades the owner of Ry?ma's items, Shishihiko Tarumi, to host the exhibition in his museum while he sets up a trap to capture Kid. Sonoko, Ran, and Conan visit Jirokichi for more details. While there, they receive a second notice from Kid who announces his heist will take place the following day and quotes Ry?ma on his plans to clean up. Conan deduces Kid ascertained the day due to the forecasted rain and advises Jirokichi to install metal detectors in the museum.