Orchestral piece based on Pen Stroke's and Batty Gloom's Past Sins.  Tried to capture the feel of the story for the first 10 chapters.  It's a pretty long piece so I stopped at chapter 10.  If you haven't read it and you're into a slightly darker MLP, then you should give it a shot:  http://www.equestriadaily.com/2011/07/story-past-sins.html.

Soundcloud (Hit another max, woo!): http://soundcloud.com/starsinautumn/undeserved-sins
Mediafire Download: http://www.mediafire.com/?884v55gsm9silvc

Art and credits: http://jeffthestrider.deviantart.com/art/Undeserved-Sins-253757193

Original credits go to Hasbro and Lauren Faust.