Gruff! takes place in a world that goats have transformed into a toxic junkyard. A young goat named Gruf discovers the magically hidden Troll Valley - the only surviving oasis of natural plant and animal life left on Earth. Gruf eagerly tries to convince her fellow goats to join her on a quest to make the world green again, but her elders are bent on drilling for fuel in Troll Valley. The fate of the world hangs in the balance!