The eccentric citizens of Blaine, Missouri, plan an original musical (Red, White, and Blaine) to celebrate the town's 150th anniversary with the aid of former New Yorker and semi-hysteric Corky St. Claire (Guest) as their director. Everyone's very game--and almost completely talentless. The Guffman of the title is the Broadway producer Corky knows and whom he's invited to see their disaster-in-the-making. A little too deliberately quirky for its own good.