It's graduation time at Bev High¿ but just as the ceremony gets under way, the entire graduating class, including Sam, Clover and Alex, mysteriously blacks out! When they wake up back at school, they're not sure what happened. Was graduation just a dream? And weirder still¿ BH seems to have undergone some "changes" in their absence. The students soon realize this isn't Beverly High at all it's actually a replica of the school¿ where they're being held captive (thanks to a high-tech security system that keeps them imprisoned)!!! Sam, Clover and Alex eventually discover that Chet is to blame. His plan? To force everyone to stay in high school forever, reliving their "glory days" over and over and over again (a thought that horrifies the Spies after all, they've spent enough time with Mandy already)! And anyone who resists will be forced to work as servants (slinging hash in the caf, cleaning the restrooms, and doing other menial tasks that keep the faux-school running). After unsuccessfully attempting to lead a rebellion (which causes Chet to cast Sam, Clover and Alex into the servant realm), the Spies are eventually able to escape the ultra-fortified school. However, they realize that their only hope of saving graduation is to free all of their classmates. And so, with the help of WOOHP, the girls infiltrate the fake Bev High and battle Chet head-on. Will the girls be able to save their classmates just in time to graduate?! In a b-story, the girls deal with the sad reality that, after graduation, they're all going their separate ways...