After Frisk goes missing, Caitlin, Frisk's twin sister goes looking for her in the the last place she saw her. MT Ebott, the mountain of dark legends, she finds a necklace that belonged to Frisk on the ground. Just like Frisk, Caitlin tripped and fell into the Underground. Caitlin finds things she never knew existed.

(Y/n), a young goat hybrid, lived on the surface with her tribe. She struggled everyday, trying to be hidden from crowds. Finally, she gets tired of her current life, and decides to climb Mt. Ebott. (Y/n) always loved scenery, and had heard rumors that of was a beautiful place. She also knew of the rumors about monsters being there. But (y/n) made the choice, and tried to climb higher, when her foot slipped, and she fell. Will (y/n) make friends, or will she die trying? UNDERTALE BELONGS TO TOBY FOX NONE OF THE CHARACTERS ARE MINE ONLY THE PLOT AND WRITING IS MINE! THANK YOU!