Volume 7 release of the anime series Toaru Kagaku no Railgun S will be out on 29 January 2014. Contains Episodes 19-21. Two editions available for preorder: Blu-ray [Limited Edition] and DVD [Limited Edition].
Mikoto Misaka, one of the strongest Level 5 espers in Academy City, gave her DNA map to a certain doctor when she was young, believing that it may be used for greater good. Unfortunately for her, it ended up being used to create massive clones of herself; forming the Misaka network, in order to create the strongest esper by sacrificing these clones whom she considers as her own sisters.