As our four zombie slayers/gangsters/prisoners escaped Alcatraz, the demon known as Brutus grabbed on and went with them. Using his dark energy, he got ready to teleport the four escapees to Hell for their crimes and past sins.

At the same time, in Equestrian, the Elements suddenly charged themselves and shot some sort of magical bolt of energy toward a scheduled lightning storm. This then opened a doorway between the worlds.

What happens now? What will these four escapees think about living in a world full of Technicolored ponies, and what will they ponies think of having four dangerous men? But more importantly, where's the guard?