Conan Edogawa 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.
Robbery - Murder (Past)
Location:Shirata Household
Victim:Danjiro Shirata
Cause of death:Blunt-force trauma
Suspects:Robbers
Accident? (Past)
Location:Shirata Household
Victim:Emi Shirata
Cause of death:Fell from high place
Accident? (Past)
Location:Shirata Household
Victim:Furuto Shirata
Cause of death:Fell from high place
Later a fire occurs and a man is burned to death.
Accident?
Location:Shitara household
Victim:Genzaburo Shitara
Cause of death:Burning
Suspects:Benio Tsumagari, Hasuki Shitara, Kyosuke Haga, and Choichiro Shitara
Interlude
It is revealed that the house hold are killed off one by one in the order of the C Concert scale. The grandmother of the house was revealed to be emotionally shocked after the death of her son; Every midnight, she would leave her room carrying the Stradivarius like a child. That night, she breaks the violin, and falls out of the window.
Suicide?
Location:Shitara household
Victim:Ayane Shitara
Cause of death:Fell from high building
Suspects:Benio Tsumagari, Hasuki Shitara, Kyosuke Haga, and Choichiro Shitara
It was revealed the culprit taped up an object to lure her to the window where she would fall to her doom.
Postlude
Conan figures out the object was the real Stradivarius that lured the grandmother to fall to her death.
Conan reveals the culprit to be Kyosuke Haga. Kyosuke reveals that the Stradivarius was originally from his family. One day, the Kyosuke's father was asked by his brother, Choichiro, to borrow the Stradivarius. He then attempts to to send back a replica to Kyosuke's father, but was found out. In an argument, Kyosuke's father falls down the stairs. Choichiro orders his family to not call the ambulance and to staged it as robbery. He even went as far to murder Chinami to silence her. This is the cause of Kyosuke's father's death. Kyosuke know all the truth from Emi two days ago shortly before her accident. As Kyosuke is taken away, he is a composer who has the perfect pitch so Conan asks him the tune of a song from the cellphone numbers and finds out the Boss of the Black Organization's number is the song "Nanatsu no Ko".
Gallery
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Trivia
In the manga, Emi's fall upturned but in the anime she fall in reverse position.
