Bodi (Luke Wilson), a wide-eyed Tibetan Mastiff, is expected to become the next village guard to a group of fun-loving, countryside sheep, but fears he doesn't have the passion to assume the role from his dad, Khampa (J.K. Simmons). Everything changes when a radio literally falls out of the sky and Bodi hears a song by rock legend Angus Scattergood (Eddie Izzard), opening his heart to a musical world he must explore. Leaving home to chase his destiny in the big city, Bodi attracts the attention of Khampa's nemesis Linnux (Lewis Black), the leader of a hungry wolf pack. It is up to Bodi to save his family and friends from harm without giving up his newfound dream.