After a 10-year quest, Lancelot and Gawain have found the Holy Grail! While King Arthur races to meet the most valiant knights of the Round Table, Lancelot and Gawain celebrate their victory over a few beers. The next morning, Lancelot wakes up in his underwear in a gay bar. The keeper tells him that he has lost the Holy Grail playing cards and Gawain has been kidnapped by environmental activists. If he does not want to be killed by Arthur, Lancelot has to get back the Grail and his companion in arms before the king of Britain discovers what happened.