In 1949, composer Roman Strauss is executed for the murder of his wife. In 1990s Los Angeles, a detective comes across a mute amnesiac woman who is somehow linked to the Strauss murder.

Juliet Forrest is convinced that the reported death of her father in a mountain car crash was no accident. Her father was a prominent cheese scientist working on a secret recipe. To prove it was murder, she enlists the services of private eye Rigby Reardon. He finds a slip of paper containing a list of people who are 'The Friends and Enemies of Carlotta'.

Mild-mannered mystery writer D. H. Mercer has become so immersed in his material that his creation, hard-boiled private eye Biff Deegan, constantly appears to him as a hallucination. Intent on getting rid of Biff, and replacing him with a more civilized detective, Mercer soon finds himself in a genuine mystery involving art fraud, murder, and a beautiful lady in peril.

Gruff gumshoe Francis Hogan is hired by a mysterious woman to find her boyfriend who has gone missing. With his perpetually hungry partner in tow, Hogan must untangle a web of intrigue involving the criminal underworld and a dead courier. One double-cross follows another as Hogan investigates the whole sordid affair.