Ten years have passed since Rokkaku Gouji resigned as mayor of Tokyo. Since then, the members of the GGs have slowly drifted apart. Corn has long moved on from his Rudie days, but once he hears of the planned demolition of his old hideout, he seeks out what became of his old friends and asks for their help to stop it. They've all got problems of their own though, especially Beat...

Frisk and some monsters are now living on the surface amongst the humans, while other monsters still live underground. But no matter where they are, a mysterious figure stalks their memories and nightmares. (Female non-silent Frisk, spoilers included with some deviations from the game, no foreseeable ships. WARNING: Possible paranoia triggers.)