Fell In Love With Motor Demon (Allison Argent/Teen Wolf)

Something is happening again in Beacon Hills. Not only does young Scott McCall become a werewolf, a family of hunters comes to Beacon Hills with their daughter Allison, but also an unknown boy appears here with his little brother. No one knows who they are or where they're from. All that remains of the older boy are the bodies of criminals burned on coals.
How will Scott and his friend Stiles deal with all of this and who is that unknown boy?

(Teen Wolf season one)