The Sheriff of Beacon Hills could be called many things but willingly blind was not one of them. When the supernatural world was shoved before his eyes and he found his son right in the middle of it, there was no other choice for him but to follow in Stiles' footsteps. And he did, willingly; there was nothing in the world he wouldn't do for him.
He just wasn't expecting to find out the things he did while learning how to swim in the deep.
Stiles can't just leave Boyd and Erica chained up in a hunter's basement, and if the only person willing to listen to him when he asks for help is a formerly dead psychopath? Well, Stiles supposes he could do worse. But of course nothing in Stiles' life is ever just that simple...