Rewritten Story // An Undertale AU

Frisk, a human who has fallen into the underground, quickly finds themselves in a situation with bloodthirsty monsters lusting for human flesh. Some monsters are not like this however, as Frisk soon finds out. This act is caused by a deadly toxin called Caratine, which can drive monsters mad, kill them, or have nothing happen to them at all. This toxin has been known to have been released by the very first fallen human, but Frisk knows well it was not Chara, her ghost friend that helps her around the underground, who did it. So the question here is... who?

This story is not yet finished!!