Can-do koala Buster Moon and his all-star cast of animal performers prepare to launch a dazzling stage extravaganza in the glittering entertainment capital of the world. There's just one hitch -- he has to find and persuade the world's most reclusive rock star to join them. What begins as Buster's dream of big-time success soon becomes an emotional reminder of the power of music to heal even the most broken heart.