A post-apocalyptic story of survival in a surreal prison built in the ruins of Tokyo. Framed for the brutal murders of his classmates by the mysterious Red Man, middle school student Ganta Igarashi finds himself sentenced to death and sent to the bizarre and fatal theme...
Ganra is about to be publicly executed by Rokuro when Senji intervenes and kills the Undertakers by attacking at supersonic speed. Meanwhile, Shiro is befriended by a mysterious boy named Toto.