In an unexpected turn of events, Ayumi becomes friends with Saki. Conan and his friends learn of Tazuko, Tachibana, and Michiyo, all of whom view Saki in a baleful way. They then learn all three of their apartment buildings can be seen from Saki's window. Tazuko's apartment is in a blind spot, but Conan and his friends believe it's possible Saki has seen Tachibana and Michiyo's secrets from her window. However, after questioning the three of them, they learn none of them hate Saki. They believe their fears were groundless, but then...