A human strikes a deal with the man who speaks in hands and is sent to the human world of MLP as a monster. Apparently he's not the first ever monster there, nor the first person to take Gaster's deal.
Discord finds a locked door in the Everfree Forest. Curiosity gets the better of him, and he just HAS to open it... ignoring all the red flags around it.
The adventure begins, with us waking up in a pastel colored, pony inhabited world, and I meet the most pecilular ponies in a small town with a castle nearby, Who am I, I Am Sans the Skeleton...
The underground is in ruins, monsters evacuating left and right and dust filling the paths leading to the King's domain. Only one monster is left to stop the rampaging human before it's too late. The judge, Jury, and Executioner: The Smiley Trashbag.
One day in their clubhouse, Sweetie Belle, Apple Bloom, and Scootaloo find a mysterious grey door in the very back that leads to a deep darkness. Curious, they enter, falling down and beginning a new adventure across many worlds.