Henri Pasquier (Pierre Mingand) is a rich playboy who enjoys careening around Paris in his shiny Buick. When his father forces him to sell the car, Henri suffers a class-related existential crisis, and falls in with a local car theft gang in an attempt to get his Buick back. In doing so, he not only learns about the underbelly of working for a living, but also falls for the sweetly seductive Jeannette (Danielle Darrieux).