Private eye Sharon McCone receives an e-mail asking for help from her emotionally disturbed half-brother, Darcy Blackhawk, but he fails to reply to her response. As her search widens, Sharon uncovers a connection to an unsolved murder of a young woman who was heiress to a multi-million dollar fortune.

PI Sharon McCone of San Francisco goes after a terrorist who is bombing diplomatic posts in the U.S. He is threatening to bomb the consulate of an Arab country, and in arranging protection Sharon becomes involved in a kidnaping as well.