Zack and Cody are graduating from middle school – or are they? When Cody finds out that he defeated his girlfriend for the coveted valedictorian spot, Zack is troubled to learn that he earned a spot in summer school. Rather than disappoint his parents, Zack devises a scheme to walk across the stage and "receive" his diploma. Meanwhile, Maddie decides to be a camp counselor but gets a little more than she expected with the girls she is to oversee.