After suffering a concussion, the Watersons come to learn that Gumball has turned feral. He no longer talks, walks, or learns, but instead acts like a real cat driven by instinct. Will Gumball ever be his old self again or is there no hope for the blue feline everyone came to know so well? (Chapters with Zach are optional, but encouraged to be read. You may skip them, if you want).