A mysterious outbreak takes over the high school.

Scott and his Pack begin a dangerous battle against an old enemy.

Stiles works on tracking down a fugitive; Liam tries to be Mason's wingman at a nightclub.

After following Dr. Valack's advice, Scott and the others begin to experience strange things.

Scott, Stiles, Lydia, Malia, and Liam are trying to figure out how to defeat the Beast of Gévaudan that the Maid of Gévaudan, Marie-Jeanne Valet, faced in 1765. As Gerard Argent, recounts Valet’s story to Scott’s pack in hopes they can deduce the creature’s weaknesses.

With graduation approaching, a supernatural force rides into Beacon Hills and crosses paths with Scott and his friends, while Liam discovers evidence of a new enemy in the high school.

Scott, Lydia and Malia search for Stiles; Liam and the others throw a party in order to keep a friend safe from the Ghost Riders.

Scott and Liam protect the lacrosse team from an attack; Lydia searches for clues in Stiles' disappearance.

As Scott readies Beacon Hills for his imminent departure, a mysterious presence breaks out of Eichen House.

Scott and Malia prepare for battle while Argent searches for an old ally.