Stiles thought his life would end in the circus just like other victims. The night of his first show a mysterious group manages to save a handful of people captured by the circus. He ends up among those people. But he doesn't know how to fit in anymore.
The darkness is always there, scraping against Stiles' soul. His mother told him about it when he was younger and that she would teach him how to use it. That never happened and saving everyone from the nemeton the darkness grew. Without an anchor the darkness would consume him. Sterek, and rated M because there may possibly be smut later on.
Stiles never really thought he was anything special. Deaton greatly contradicts that by giving him a spell book and telling him to try his hand at magic. He didn't think magic would come to him and he also didn't think it would be hard. Oh and he never thought his own mind would fantasize about Derek Hale.
Stiles was born and raised a hunter. Living his whole life by the code and killing the supernatural that break it. He never expected his best friend to become a werewolf, never thought his brother would date one, and he most certainly never thought he'd join a pack.