Stiles frowns, thinking. "But if you join them, what happens to--your betas?" He'd almost said us. That would be crazy. If he was anyone's beta, he'd be Scott's. Right? But he wasn't, so...the question still stands. "It doesn't make sense. You can't join a pack if you already have one."

And then it clicks, and his blood runs cold, because half of Derek's pack is gone already, and guess who's responsible? He can't let this keep going. Not if he can just think fast enough to find them. His foot on the gas pushes harder, and he nearly scrapes the side of the Jeep on the curb as he pulls up to their next stop. They just have to find them. There is no other option.