Sweeney (Anthony Newley) is a playwright on a career decline. He spends much of his time wheedling money and beer out of his artistic friend Moriarty (Isaac Hayes). One of his few highlights is weekly sex with his ex-wife Georgia (Stefanie Powers). She is remarried to a rich but vile construction developer (Henry Ramer), but Sweeney and Gorgina are still in love.
Set in the year 2024 in post-apocalyptic America, 18-year old Vic and his telepathic dog Blood are scavengers in the desolate wilderness ravaged by World War 4, where survivors must battle for food, shelter, and sexual companionship in the desert-like wasteland.
Monty Python and the Holy Grail loosely follows the legend of King Arthur. Arthur along with his squire, Patsy, recruits his Knights of the Round Table, including Sir Bedevere the Wise, Sir Lancelot the Brave, Sir Robin the Not-Quite-So-Brave-As-Sir-Lancelot and Sir Galahad the Pure.