Two sisters move to the country with their father in order to be closer to their hospitalized mother, and discover the surrounding trees are inhabited by Totoros, magical spirits of the forest. When the youngest runs away from home, the older sister seeks help from the spirits to find her.

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.

Kaitou Kid dares to challenge the police once more, setting his sights on the Russian Imperial Easter Egg. With the date, time, and place, the Osaka police force scrambles to stop him. But this time, Kid may have bitten off more than he can chew—Conan Edogawa, Heiji Hattori, and numerous others are also trying to get their hands on the jeweled egg.