Part 1: On the eve of senior year, Scott and his friends find themselves facing the possibility of a future without each other, a next phase of their lives that might take them in different directions despite their best intentions. Little do they know that outside forces are already plotting to break the pack apart long before they ever see graduation. Part 2: Reeling from crushing losses, Scott struggles to put his pack back together while the Dread Doctors’ final creation, a creature known as The Beast, terrorises Beacon Hills.