Glitch and Anti-Virus, a.k.a Anti, never asked to be alone. They had no choice. They used to be normal. Their names were Gabriela and Annaston, a.k.a. Gabby and Annie. They were sisters that would play together, and they both worked for Dr. Gaster. But when an experiment went wrong, they became corrupted human-monster fusions, banishing them from the world of Undertale and into their own little world, with no memory of their true selves and the ability to manipulate the very code of the universe. However, when Glitch hacks herself a way to their previous world, things start getting a little crazy, and with Frisk's help, Anti has to stop her sister and SAVE the world... ...but can she do it in time?