In 1998, dim-witted slackers Beavis and Butt-Head are mistakenly sentenced by a judge to Space Camp as punishment for trying to set fire to a science fair. At the camp, their utter lack of intelligence ironically appeals to an astronaut running an aptitude test, who recruits them for a classified NASA space shuttle mission alongside two female astronauts. Believing they are finally going to "score," the duo readily agrees, completely oblivious to the danger. Once aboard the space station, they mistake the station's
particle accelerator for a giant sexual device. While recklessly tampering with it, they create a powerful black hole and accidentally become trapped inside it, instantly catapulting them twenty-four years into the future.Emerging from the anomaly in the year 2022, the pair remains completely unchanged physically and mentally, entirely unaware of the time slip. They are quickly discovered by authorities, who mistake them for highly evolved, highly dangerous interdimensional aliens or sophisticated government spies. Hot on their trail is a ruthless, corrupt Governor determined to capture them for political gain, alongside a surprisingly competent smart version of themselves from an alternate universe who crosses over to help save the timeline.Throughout their frantic cross-country flight to evade capture, the boys remain single-mindedly obsessed with finding a television, acquiring nachos, and ultimately "scoring," utterly indifferent to the apocalyptic stakes swirling around them. They navigate modern technology with hilarious confusion, accidentally winning the affection of fiercely independent versions of themselves from a
parallel dimension who find their primitive antics strangely endearing. As the net tightens around them, they inadvertently stumble into the Governor’s high-tech facility, where a chaotic confrontation ensues involving government agents, futuristic gadgets, and their alternate-universe counterparts.Ultimately, Beavis and Butt-Head manage to inadvertently trigger another sci-fi anomaly, defeating the villainous Governor through sheer dumb luck and saving the multiverse without understanding a single thing that has happened. Rather than settling down or showing any growth, the boys happily commandeer another vehicle, completely content to return to their lazy, television-addicted lifestyle. They hit the open highway, continuing their endless quest for cheap thrills and mindless entertainment, blissfully immune to the passage of time, the evolution of human society, and the massive cosmic events they just survived, proving that some things truly never change.