Conan and Kogoro feel something is wrong with DoDonPa's all too convenient alibi. After taking on the guilt for a murder he didn't commit, DoDonPa becomes the man of the hour for trying to protect the reputation of his benefactor Tendo. Conan begins to strongly suspect him.

Author Keigo Hiura's assistant Chiaki Minazuki is found strangled to death in a hotel room directly below his. Conan and Sera are certain he committed the crime, but cannot find a hole in his alibi. After learning of the condition of Minazuki's room they get closer to the truth. After seeing and hearing more, Conan and Sera realize how Hiura manipulated his alibi...