Midsummer's Equation

Conan tries to track down Kaito Kid, who supposedly steals a replica of one of Van Gogh's Sunflowers paintings during an auction.

Ran’s secret past revealed! Ten years ago, something happened between her mom and dad. Now, plagued by nightmares, Ran is starting to remember… Meanwhile, a murderous card dealer breaks out of jail to seek revenge. His target: Ran’s father. Can Conan stop him in time and save his girlfriend’s family?

While visiting Hachijo-jima, Conan sneaks aboard a security boat heading to the Pacific Buoy, an off-shore facility constructed near the coasts built to connect surveillance cameras used by police forces around the world. However, an engineer gets abducted! An eerie sound of a propeller hums underwater as a dark figure begins to creep toward Ai Haibara... When the forbidden Black Box is opened, the sealed-away past will surface above the treacherous waves!

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.