Alex Lahey is a sophomore at Beacon Hills High School. She's always been the quiet girl with only a few friends. Her brother has always been there protecting her from their father. When Isaac disappears without a trace, Alex goes out to find him. She gets bitten by a werewolf, and Scott and Stiles find her unconscious in the middle of the road. Stiles lets her stay at his house for a few days, and he introduces her to the pack, but everything changes the night of her first full moon.