Ploooooooooooooooooot. :)
Ok so-
An angel is on a mission to hell, trying to rescue a soul who was wrongly imprisoned there. Unfortunately, he gets very lost and subsequently trapped in there, only able to escape execution through the help of a demon who offers to lead him out of hell. But he won't leave without fulfilling his mission...and he's quickly coming to realize, he won't leave without her either....
Well, I believe it was clear what it was. I mean sure, it's hell, there's never a time of peace. But the glimpse of what seemed like feathers, white feathers at that could send the idea.. someone from somewhere else was there. That, and the sounds of yelling, fighting, and just the sight of guards struggling we're enough to hint towards it.