Sam, Alex, and Clover are off to another regular day at Beverly Hills High School -- until they find out that Mandy has been voted "Principal for a Day"! With new rules, Mandy guards patrolling the school, and students that act like robots, the girls suspect something very strange is going on. Now it's up to them to find out just what it is -- and who's really behind it! Join the spy girls in this action-packed quest to save their school!