The Doctor has found a new companion. On his way to the Grand Canyon he meets Ablynn Nelson, who has more about her than either of them know. After multiple efforts to reach the Grand Canyon the two finally get there and meet someone the Doctor never intended to see. A mysterious voice gives them a prophecy and they end up having to fight a monster that involves the Doctor and his new companion to work together. Will they be able to destroy the monster? Will the universe be safe if the monster rages on?