They are all gone. The hunters came in and took them all away. Stiles can't handle that, he can't deal with his Dad being gone let alone the fact that he just buried what was left of Chris and Peter. He was out with Scott trying to find Alison and Isaac and the house got attacked, their search party got attacked and in 30 grueling minutes Stiles not only felt all of his pack ties snap he felt the rip inside that came from his mate bonds breaking.
He isn't sure what he did after but he knows he went home, stood in the ruins of the home he, Peter, and Chris built for them to live the rest of there lives in. He buried them then went back and just sat, as a storm started he didn't even move he was empty and broken. He should have died with them...
Then he hears crunching, it sounds far away but Stiles can fell someone close. He looks up into the face of a stranger and cocks his head to the side giving a clear view of his neck. He won't fight, he just wants his mates and his family back and to rip every single hunter to pieces.
That's when this strange woman laughs and Stiles can see the supernaturaly sharp teeth and the blackness in her ryes. She holds her hand out to Stiles and says "Alright sweetheart up you go, let's get you fixed up, then lets make a deal". Stiles knows he should walk away, send this woman away.
But if he can bring them back, if he can have them safe and sound then he'll do it. He doesn't care what happens to him.