When the Cult of the Evil Monkey (Comprised of 5 members total) perform an old ritual that hasn't been performed in over 1000 years, the mane six and the Cult are somehow sent to eachothers different universes. The goths wind up bleary eyed and confused in Equestria, while the mane six are struggling to see any light in the Human World. How the hay are they going to get back, and what do a vengeful unicorn and a scatterbrained pegasus have to do with it?