A gang of nasties, having violently robbed a bank and being chased by a posse, pass through a tunnel and enter a town where, to their absolute amazement, no-one carries a gun, drinks, swears or resists them. That's because they've entered Purgatory, where everyone is on probation as to which way they'll go, up to play harps with the angels, or down into that nasty sounding inferno.