Based on characters created by Dashiell Hammett and "The Thin Man" motion pictures. It is 1937 in Hollywood and Nick and Nora Charles, inhabitants of San Francisco, return to their bungalow at The Garden of Allah Hotel following the wedding of a school chum of Nora's that has brought them - along with their dog, Asta - to Los Angeles. Their enjoyment of the mood and of each other is interrupted by another of Nora's old school chums, movie star Tracy Gardner. Tracy, a Best Supporting Actress Oscar-winner, is in need of Nick's services as a detective: Max Bernheim, celebrated German film maker and director of Tracy's current picture, has been arrested for murder, and Tracy wants Nick to take on Max's case so filming can resume. Nick declines, claiming he's retired, but Nora - ever loyal to her favourite Farmington classmate - decides to take on the case herself, with Nick - who doubts that Nora can carry it off - as her assistant.