(The war between monsters and humans happened again, Sans, Papyrus and everyone else died... Frisk, she is very determined and Chara, with only her spirit remaining that is guiding frisk they are trying to protect the last monsters, they had determination and with their THE STRENGTH OF WILL, THEY FIGHT...)

you are just a normal human who fell underground, you are looking for a way out and end up finding them two... they attack you and you end up injured...