Life in a Prison Town

This is a prison town where everyone kills for the love of their nature.
A cold hearted girl gets locked in a small prison town after comitting a murder.
After a while she gets something she really cares about and this may cause her to make a mistake or to let her guard down.
Will she finally become the soft person everyone always wanted her to be?
Will a war break out when everyone finds out that her sentence has been reduced?
Will she stay cold hearted and start killing again once she's been relased so that she can be sent back to the prison town where her true colours shines bright?