After being defeated by Cuphead and Mugman, The Devil decides to look for a new place to spread misery and misfortune. After searching, he finds the perfect place, Las Pegasus and who should happen to be there? Starlight, Trixie, Thorax and Discord, as part their girls funtime trip there. After falling for the Devil's easy persuading the four friends find themselves prisoners of the Devil, causing the Mane Six, along with Cuphead and Mugman to fight to free the friends from the Devil's clutches, before he turns all of Equestria into a hud of sin and evil.