Jackson is kind of a troublemaker. Well, not kind of, he is a troublemaker! When he creates his own ticket to win Principal for a Day as a joke, he never, ever expects he'll be picked. But then he hears over the loudspeaker, "Jackson Stiller, you're this month's Principal for a Day!" Now, he must spend a day with Principal Pennyworth and deal with unruly younger graders, hall-walkers, a super-scary kindergarten class, and even other troublemakers!