Scott, Lydia and Malia have to take drastic measures to quell the growing violence in Beacon Hills, while Liam endures his own gauntlet at the high school. While Scott and the others desperately pursue a missing werewolf, Melissa and Argent investigate the nature of a strange body. At the same time, Lydia must face her own fears of Eichen House. Lydia's memory brings back Stiles from the portal; Douglas returns to try and complete his mission to bring Ghost Riders back permanently. Scott and the gang form a plan to use a transformer to capture a live Ghostrider; Meanwhile, Lydia tries to prove to Sheriff Stilinski that Stiles exists. Lydia still tries to find proof that Stiles existed; Meanwhile, Scott and gang try to form a plan from preventing the Ghost Riders from erasing more people at the school.
Scott's a non-athletic, socially awkward high school sophomore Now he's the popular star of his lacrosse team and dating the new girl in town. But Scott's "new" abilities also pull him into the middle of a war between werewolves and werewolf hunters.