Notice the subtitle: . This is the third of four parts, arriving just before the climax.
Masumi shines in her interactions, showing her intelligence and ability to lead the conversation, while remaining a close friend to Ran and Sonoko.
As the episode progresses, Conan and his friends discover that one of the customers, a man named Taro Yamada, has been murdered, and the killer is still in the restaurant. Conan uses his detective skills to gather clues and solve the mystery.