The Disappearance of Conan Edogawa: The Worst Two Days in History
名探偵コナン 江戸川コナン失踪事件～史上最悪の二日間～
1 sub eps
The anime special celebrates the 20th anniversary of Gosho Aoyama's original manga, and it recounts a previously untold story from Conan's past. (Source: ANN)