Steeltrap is after Prince Martin York in order to stop a Global Peace treaty from being formed. When Steeltrap targets York's daughter, Aaron takes Princess Nikki York into his personal protection program.
Even though Stan told him not to, Aaron decides to use Emma's new jet pack. While clumsily using the jetpack in a fight with Hive, Zombie Weevils secretly hitch a ride on the jet pack. Hive's weevils turn the students of Eastland, including Jason, into zombies!