[Machine Translation] Takashi and Nana are invited by their college acquaintance, Yukiko Midorikawa, to attend a Sherlockian exhibition. During their visit, one of the participants inexplicably fell from the exhibition hall and became unconscious and in critical condition. What was in her hand was a violet flower...! The case, which revolves around the meaning of "Murasaki", leads us closer to the secrets hidden in "The Tales of Sherlock Holmes" and "The Tale of Genji". Included with "QED Perfect Guidebook".