Uiharu, winner of the Jailbreak Challenge, has been kidnapped! In order to save her, Mikoto, Kuroko, and Saten must confront Shundan Kimi's accomplices, who have taken control of the Reformatory with the help of the recently freed Kimi herself. Do Uiharu's friends have what it takes to overcome Kimi's newfound ability?

Translation of: Toaru kagaku no railgun. Reads from right to left.