Only four of Bugatti Type 57 Atlantics were ever built. It was the car used by British racing ace, William Grover Williams, who became an undercover agent in Occupied France. Years later, two racing drivers, with a passion for antique cars, compete to find new clues as to the car's hiding place in France. When a local researcher turns up dead, Bruno races to find the murderer and to track down the fate of the most beautiful car ever made.