ストラディバリウスの不協和音（前奏曲）

Conan tries to figure out the phone number to the boss of the Black Organization. Mouri is invited by a granddaughter of a rich household to solve these mysterious accidents that happen whenever someone tries to play a Stradivarius for her grandfather on his birthday. Four incidents have happened on that day already and it is about to come up again. Later a fire occurs and a man is burned to death.