An assassin targets Scott and Liam at the lacrosse team's annual bonfire.

Scott finds himself turning to an unlikely ally for help. Stiles and Lydia attempt to find out the truth about Parrish.

While trapped in Eichen House with Theo and the Chimera pack, Scott tries to rescue Lydia before time runs out.

With the identity of the Beast finally revealed, Scott and his friends are in a race against time to stop The Dread doctors from implementing their final plan.

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

Liam and Theo attempt to draw the Hunters away from Beacon Hills.