When we last saw George and Harold, they were headed to jail for the rest of their lives. What could be worse? How about being pulled from prison by a time-travelling tyrant named Tippy Tinkletrousers?!!? Now the boys are taking a trip back in time to the carefree days of kindergarten, when the scariest thing they had to face was not evil mad scientists or alien cafeteria ladies, but a sixth-grade bully named Kipper Krupp, the nephew of their clueless school principal.