Caesar and Anders find themselves on a dangerous quest to save the only man that can bring them home. But Logan Rutherford is sought by others, and whoever reaches him first will harness the power of Arcadia. Amelia is quickly appointed Chief, yet the role comes with unforeseeable dangers. She soon realizes the town holds dark secrets connected to the Shift, but some secrets are best kept buried. As the people of Carmichael venture into Arcadia, they encounter survivors who have learned to navigate the treacherous land, while their connection to Earth fades into distant memories.