Running out of time, Scott, Lydia and Malia decide to storm the rift in a desperate attempt to get Stiles back. Liam, Hayden and Mason make a deal with Theo in order to learn Douglas's real plan.
Hoping to align with a familiar ally, the Argents reveal a key clue to the mystery of the Beast of Gévaudan. Meanwhile, Scott tries to take on the Beast himself.
Taken into questioning by Ramsey and her team, Everett, Blake, Luna, and Harlan construct an alibi. Luna and Harlan make a startling discovery when they defend Everett from their first terrifying sighting of the creature.
The full moon is reaching its peak as Everett, Blake, Luna and Harlan are drawn together by an unknown force. Kristen locks onto the group as suspects. The teens start to experience ominous dreams that obscure their reality.