All the problems with Eden are over and the world is finally at peace again, but not everyone is happy about that. Now the nations' Shares are drastically unbalanced, and that never leads to anything good.
Eden acts on its bold proclamation and invades Planeptune, but Neptune is too upset to fight, leaving Nepgear on her own. The other CPUs aren't able to run much interference because they've got problems of their own.
Noire's up to something at night behind closed doors, and Uni's dying to know what it is. Luckily, she's got tech expert Nepgear to help her out. But as it turns out, Uni's not the only one interested in what Noire's doing.
Nepgear, Uni, Rom and Ram are instructed to go back home after their sisters' capture, but they can't bear to leave their families behind in danger. To get their sisters back, they'll have to learn how to transform into goddesses themselves.
Vert offers to throw all the goddesses a party in Leanbox, but when they arrive, she's busy with another kind of party. Then, just as the celebration finally begins, the Basilicom staff reports a monster invasion that has all the CPUs leaping to action.
A day at the amusement park takes a sinister turn when two (mostly) innocent girls are kidnapped by a monster. And then a stranger with a camera crew barges into the Basilicom, spinning into motion bizarre happenings.