Set in a world like ours but entirely inhabited by animals, Buster Moon, a dapper koala, presides over a once-grand theater that has fallen on hard times. Buster is an eternal-some, might even say delusional-optimist, who loves his theater above all and will do anything to preserve it. Now faced with the crumbling of his life’s ambition, he has one final chance to restore his fading jewel to its former glory by producing the world’s greatest singing competition.