DETECTIVE CONAN: FULL SCORE OF FEAR

Serial murders involving all kinds have happened. All the victims are from a Music School led by a famous pianist. Conan and company have been invited to a opening concert of the Music Hall built by the pianist. The biggest attraction of this concert is the world famous violin called "Stradivarius" and a special appearance of a singer who has perfect pitch. (Source: Anime News Network) — Description from AniList community (anilist.co).