In this timeline, everything is mixed, with plot holes errors, and eventually the game has "strong glitches". Gaster!Sans and Gaster!Papyrus are the protagonists. Together with Alphys they are trying to understand what happened. In many oddities of life and anxiety. Frisk lives with them, but they speak rarely and not very good, because the sound is low or breaks. Therefore, Flowey, who lives with them, is the "mouthpiece."
Basically, the story revolves around the strange feelings and instincts of characters.
There have been G! Sans and G! Papyrus from the confluence with the Gaster due to an accident occurring during a secret experiment.
- G! Sans and G! Papyrus magic had no color, though G! Sans decided to paint it yellow.
This AU, as Underpatch, full of mistakes, and the characters it sees "false memories". It erases an anomaly universe. To stop this, you need to get to the core and allow it to strongly Frisk.
The story began in True Laboratory. The anomaly that emerged after the disaster there, all locations mixed. For example, Snowdin was cold snow, due to the anomalies it becomes hot. That is an anomaly all mixed together. Therefore, they can not get to the core. Frisk hears the "voice" of the nucleus, and G! Sans (Frisk calls him "G"), while Frisk sleeps, holds various experiments in physics and logic places to prevent repeat accidents. When approaching them to the core, it always disappears or repeats location. So, in a sense, the core is everywhere. Echo flowers - the only balanced thing that keeps a strong core magic. They grow everywhere, replacing the golden flowers.