As a kid, you had a friend named Sans. Unfortunately, that was the time when the war started. Monsters were forced underground. And being a skeleton, so was he. Many years later, you had fallen down a giant hole in a mountain. You quickly found out where you were, but you noticed that it was completely empty. And the place was covered in dust. After wandering for a bit, you saw a strange figure in the distance. As you got closer you noticed it was... Sans. But why did he seem so... creepy now?