Frank and Luella are employed by American private investigator Joe Venice who has been arrested for murder by Sergeant Keeler. He offers them $15,000 to prove his innocence and find an old American car, worth $150,000, for a collector in Hollywood. Frank crosses path with criminals and boy racers from his past life, in the police, discovers the car had been used in a Post Office robbery in 2003. A tattooist injured by the car at the time and a petty criminal watching her lead Frank and Luella to the murderer and the solution of the robbery.