Thelma Harper and her spinster sister Fran open their home to Thelma's recently divorced son Vinton and his teenage son and daughter. It's quite an adjustment for everyone, especially the cranky, argumentative Thelma.

Broad satire and buffoonery presented as a series of movie trailers. Among the titles and subjects are: "The Howard Huge Story", "Skate-boarders from Hell", "The Invasion of the Penis Snatchers", Woody Allen (pre-Mia), movie trailer come-ons, Charlie Chaplin, war movies, Billy Jack. The source of the title is presented about an hour into the film.