Two years after the battle for Akibastar where Sono Chieri became Center Nova and Motomiya Nagisa became Maeda Atsuko 14th, some Trainees were able to become Successors, whereas Chieri stays a Trainee because Yuko hasn't graduated yet. A new generation of Understudies come in who will become the revolution of AKB0048. Girls that will bring forth the power of Center Nova and enter the gate to the other side. A face that come of the non-graduated Successors knows will come in, looking for her sister Maeda Atsuko 13th. But when she finds out what happened to her sister, will she be able to cope with her loss? Or will she do everything in her power to bring her sister back?