Austin has a dark and considerably ugly secret: he's a trained assassin. His skill with a bow and arrow surpassing that than his skill with a guitar. When a few jobs lands him the title of a masked vigilante, his other ego begins to gain more attention than he would like. Now he just has to make sure Miami doesn't find out their new beloved vigilante is actually a killer.

Deaton had called him a Spark. Stiles had never taken it seriously; had never realized the potential that lay hidden with that title, yet he felt useless and wanted nothing more than to help. Feel useful; powerful. One night, he has a conversation with Deaton that gets him curious. Stiles finds out just what a Spark can do. The results shock even Deaton.