In this upbeat British comedy, two friends enter an antique car rally. Alan McKim (John Gregson) drives his beloved 1904 automobile, named Genevieve, while Ambrose Claverhouse (Kenneth More) takes his vintage Spyker car. Alan and Ambrose bring their wives (Dinah Sheridan, Kay Kendall) along for the wild ride from London to Brighton, and the trek soon turns fiercely competitive, each driver devising clever ways to sabotage the other in hopes of winning the race.