Shadows of the Missing Past

As Sans and his friends adjust to life on the Surface, he tries to solve some mysteries that have been shadowing him and his brother for a long time. This seems very, very interesting...

This Fan fiction is based off of the Undertale AU Handplates by zarla-s. I absolutely love their work and this comic, so I just had to make a fic. Also, zarla-s, if you're reading this.... B I G. F A N.