G.C. 2015—Gamindustri has entered a precarious season known as the CPU ShiftPeriod. During this time of social unrest, deprecating rumors about the CPUs havebegun to saturate Gamindustri. Neptune and the others worry the citizens will sooncall for new leaders to replace them and that their rule will end. In these criticalmoments for Planeptune, Neptune and Nepgear mysteriously disappear. Theirdestination is a divergent world, nearing its catastrophic end, called the ZeroDimension. They encounter the last remaining CPU of this world, UzumeTennouboshi,who is desperately waging a lonely battle against a colossal evil known as the DarkCPU. Will Neptune and Nepgear be able to work together with Uzumein in order tosave Zero Dimension from tragedy?