When Paul Casablancas, Claire DeWitt's musician ex-boyfriend, is found dead in his home in San Francisco's Mission District, the police are convinced it's a simple robbery. But, as Claire knows, nothing is ever simple. With the help of her new assistant Claude, Claire follows the clues, finding possible leads to Paul's fate in other cases - a long-ago missing girl and a modern-day miniature horse theft in Marin. As visions of the past reveal the secrets of the present, Claire begins to understand the words of the enigmatic French detective Jacques Silette: 'The detective won't know what he is...