Those who are lost follow the guiding light. A traitor to one can become an ally to others. That is the fate of changelings who have defected from the hive of Queen Chrysalis. This is the report of one of them; code named "Melody Light", an assassin hired by Celestia to destroy organised crime from within.

However, self conciousness is the bane of any assassin, and Melody must fight the memory of the pony who died at their hands two years ago. Can they overcome their sins of the past to achieve what is important today?