Determined to become an active environmentalist, Kat enrolls in shop class to convert her gas-guzzling car into a biodiesel vehicle. As the only girl in the class, Kat realizes that she needs to do more than fix cars to break the stereotype that girls can do anything boys can do.

When local residents are evacuated to Padua High during a brushfire emergency, Bianca tries to use the crisis as yet another opportunity to win over Chastity. In order to please her, Bianca must set out to find a private room in the school for Chastity.