Romilly Squire

In Edinburgh washed up country-and-western singer John McGuire is broke and his family is emigrating. He and grandson Billy share the same dreams. They run away together in search of John's wealthy American ex-co-star Betsy Hall.

Os Monty Python estão de volta - desta vez à procura do Cálice Sagrado, por terras do reinado de Camelot. Pelo caminho, encontram o estranho Cavaleiro Negro, insultam vários franceses e tropeçam em Cavaleiros que dizem Ni!