After Allison sees her father, Chris Argent, fail in his attempt to run Scott down with his car, Chris Argent decides to send Allison and his sister Kate to Washington. Stiles convinces Peter Hale, who is the alpha werewolf, to spare Lydia's life after he bites her. Peter Hale agrees to Stiles' request, but in return Stiles must help him locate Derek. Meanwhile, Jackson is called to get Lydia to the hospital. Scott must cope with the girl he loves knowing his secret.