In the fall of 2011, Scott McCall and his best friend Stiles Stilinski, son of Sheriff Noah Stilinski, wander out into the woods to look for a dead body. That night, Scott is bitten by an Alpha werewolf, becoming one himself. As Scott and Stiles learn how to be a werewolf with help from local werewolf Derek Hale, they work hard to avoid a group of Hunters surnamed Argent (which happens to be the French word for silver). Of course, things get a bit stickier when Scott's lacrosse rival, Jackson Whittemore, learns that Scott is a werewolf, and even worse when Scott learns that his new girlfriend, Allison Argent's, dad is the leader of the Hunter pack, though Allison remains oblivious.
But wait, there's more. Allison's sadistic aunt and Derek's ex-girlfriend, Kate Argent, arrives to cause some trouble, namely for Derek. It's revealed that she was behind the house fire that killed Derek's entire family, save Derek's uncle Peter Hale, who survived. As Kate tries to get into Allison's head so she'll kill Scott and Derek, her father, Chris Argent, steps in and stops her, having been told the truth about Kate from Stiles. It's then revealed that Peter has been terrorizing the town as the Alpha, forcing Scott, Derek, and Argent to work together to stop him, but not before Peter kills Kate. Since Peter killed Derek's own sister, Derek kills Peter in turn.
