Detective Conan OVA 06: Follow the Vanished Diamond! Conan & Heiji vs. Kid!

Mori Kogoro’s private detective agency receives an unexpected blackmail call, though it soon becomes clear that the caller has dialed the wrong number. Recognizing the voice as strikingly similar to that of his old friend Heiji Hattori—the renowned high school detective from Osaka—Conan quickly reaches out. The two partners reunite to tackle the case, aiming to track down a stolen jewel and bring the culprit to justice. However, they are not the only ones with their eyes on the prize. The legendary phantom thief Kaitou Kid has also set his sights on the gem, valued at 100,000,000 yen. Now, Conan and Heiji must race against both the thief and time to secure the jewel and solve the mystery first.