In the year of 202X, a human child falls down a hole, trapping them underground in an underground society of ponies trapped in the cave systems by a magical barrier created by the Seven Souls of Harmony. With the originals missing for years and all the ponies losing all hope, the human must make new friends in order to assemble the new Seven Souls and break the barrier once and for all.

(An Undertale / My Little Pony Alternate Universe)