In Southern California, two lovable but dim-witted high school friends are on the brink of failing their history class. Facing the threat of being separated due to the possibility of one being sent to military school, they are presented with a virtually impossible task: to pass an oral history report. Despite their passion for forming a rock band, their academic achievement is less than stellar. Unbeknownst to them, the future of humanity hinges on them staying together and ultimately succeeding in their musical ambitions. In an extraordinary twist of fate, a guide from the future arrives in a time-traveling phone booth, heralding the beginning of an incredible journey through history.

Employing the miraculous time machine, the duo embarks on an epic quest, travelling to different time periods, and collecting various significant historical figures to bring back to their present day. Their whirlwind adventure sees them crossing paths with icons like Napoleon, Billy the Kid, Socrates, and more as they attempt to learn enough about history to ace their oral report. The experience not only presents them with a vast tapestry of history but also an opportunity to reflect on their own lives, friendship, and destiny, all while racing against the clock to complete their assignment and avoid dire personal and universal consequences.