In a reimagined medieval England, King Arthur embarks on a quest to find the legendary Holy Grail. He is accompanied by his loyal servant, Patsy, and soon gathers a group of knights to join him, including Sir Bedevere, Sir Lancelot, Sir Galahad, and Sir Robin. Their journey is filled with absurd challenges and encounters. Each knight faces his own peculiar set of trials. Along the way, they deal with rude French soldiers, confront the enigmatic Black Knight, and are perplexed by an odd trio of questions from wise men. The humor is surreal, and the situations grow increasingly ridiculous as the group ventures forth.

Throughout their quest, the knights face a series of absurd and humorous obstacles, such as killer rabbits, the Knights who say "Ni," and a mysterious enchanter named Tim. They persist despite the constant barrage of threats and peculiar adventures. The narrative seamlessly blends references to medieval folklore with contemporary satire, often breaking the fourth wall and integrating anachronistic humor. As they progress, the group's unity and purpose are consistently tested, leading to a conclusion that further accentuates the film's unique comedic essence.