His brother dead, monsters strewn dead across each floor, Sans has finally defeated Frisk, the 'Dirty Brother killer'. But as he stumbles away from the child's body, he dies out on the floor due to pure exhaustion. That was the end of the tale. Or.... Was it?

One day, when Sunset Shimmer is walking to school on a cold winter morning, she hears groaning in a nearby alleyway. When she looks in it, she sees a skeleton in a Jacket, sitting on a wall in the alleyway... Alive. Trying to save it, she takes it to her house to see what it is, and where it came from. But when these two beings meet, it sparks up something magical.... Or will something more dark come out of it?