Walking In

Peter is a man who finds vengeance therapeutic; but it is only through premeditated, calculated revenge that he can find any peace. So when he saves Stiles from a mugging one night, killing the assailant in the process, an untempered rage grows in him unchecked and drives him quite nearly insane. It is only by vowing to continue protecting Stiles that he feels anything close to release, and only by saving his life once more--and saving the bad guys' punishment for later--that he even has a chance at coming back to his former self.Only, by then, it's too late; he's become a different person around Stiles, and if he wants to keep Stiles around at all, he needs to stay tapped into some kind of inner goodness. That is, until Stiles reveals a darkness all his own.Can they meet in the grey middle, or will they both succumb to self-destruction?