Kudo Shinichi no Fukkatsu! Kuro no Soshiki to no Taiketsu

Conan attends a party for the "Miss Japanesque" awards, where he happens to eat a cake that temporarily transforms him back into Kudo Shinichi. While there, a murder takes place, and he has to solve the case. The special will also feature the first live-action appearance of the Black Organization.
(Source: Tokyograph)
~~ Adapted from the manga "Detective Conan" (名探偵コナン) by Aoyama Gosho (青山剛昌).