The Disappearance of Conan Edogawa: The Worst Two Days in History(2014)

Meitantei Conan: Edogawa Conan Shissou Jiken - Shijou Saiaku no Futsukakan

It's been announced that a new Detective Conan anime special project is launching. The "astonishing collaboration" is titled "Edogawa Conan Shissou Jiken: Shijou Saiaku no Futsukakan" (The Disappearance of Conan Edogawa: The Worst Two Days in History).

The anime special will celebrate the 20th anniversary of Gosho Aoyama's original manga, and it will recount a previously untold story from Conan's past.

(Source: Anime News Network)