After 32 years, Garrison Keillor's radio variety show is coming to an end. Set on a rainy Saturday night in St. Paul, Minnesota, fans file into the Fitzgerald Theater to see "A Prairie Home Companion," a staple of radio station WLT, not knowing that WLT has been sold to a Texas conglomerate and that tonight's show will be the last. Backstage cast and crew assemble for one last hurrah. They include: The Johnson Sisters, Yolanda and Rhonda, a country duet act that has survived the county-fair circuit; Lola, who gets her big chance to sing on the show and then forgets the words; Guy Noir, a private eye down on his luck who works as a backstage doorkeeper; and Dusty and Lefty, the Old Trailhands, a singing cowboy act.