The story takes place several years after Lelouch's "Zero Requiem" plan. He gave up his life to save the world and protect the ones he loved. The day Lelouch vi Brittannia fell was the day this war-torn world found peace. Now, as his friends work to keep the peace, a terrorist attack could risk everything. Can the brilliant tactician outwit death and save them all? Or will Lelouch’s legacy fall here?

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.