Henry, a valedictorian-bound high school student, reunites with his childhood friend, Travis, a laid-back teen more focused on recreational drug use than schoolwork. A day before Henry is about to secure his top spot with his final exams, the school principal imposes a mandatory drug test in response to a student's drug-related mishap. With their futures now uncertain, Travis concocts a bold plan to spike the entire school’s bake sale brownies with marijuana, ensuring everyone tests positive and rendering the results void.

As the drug-laced brownies spread throughout the school, chaos ensues with students and faculty alike unknowingly consuming them. The school descends into a haze of hilarity and confusion, complicating Henry's careful plans. Amidst the turmoil, the principal fervently attempts to maintain order while Henry and Travis strive to avoid detection and salvage their futures amidst growing suspicion and an unexpected series of events.