If you want to know what Conan Special Volume is, click here.
Anyway, Special Volume 26 Files 11-12 is entitled "The Appearance of the Black Organization (Part 1 and Part 2)". Haibara has recieve a letter that says "Sherry at last I found you, you can't run anymore. If you are to run away, I will kill all the students at this school", what would Conan and Haibara do?
Part 1 - Conan Special Volume 26 File 11
Part 2 - Conan Special Volume 26 File 12