Private eye Sharon McCone receives an e-mail asking for help from her emotionally disturbed half brother Darcy Blackhawk. She replies . . . but gets no response. As Sharon digs deeper, she discovers that Darcy sent his message from an Internet cafe in San Francisco, a city he's never been to before. Sensing that her brother is in terrible danger, Sharon begins a search for him throughout the city.

The investigation leads her to the body of a woman at the Palace of Fine Arts, where a witness had told her that Darcy was headed. Then, as she digs deeper, Sharon uncovers a connection to the unsolved murder of a young heiress to a multimillion-dollar banking fortune. Now Sharon must race to solve both murders and ensure her brother's safety, despite the imminent danger that lurks within her own family.