Manhattan's top sex crimes prosecutor opens her newspaper one day to some shocking headlines: Sex Prosecutor Slain - FBI, State Troopers Join Search for Killer. The supposed victim is Assistant D.A. Alexandra Cooper, but Alex is still very much alive. Dead, on the wooded road leading to Alex's summer home on Martha's Vineyard, is beautiful film star Isabella Lascar.

Isabella had borrowed Alex's house for a secluded holiday. Now her body has been found without any identification in a car rented in Alex's name, her face disfigured beyond recognition by the shotgun blast that took her life. The local police naturally assumed she was Alex.

There are two possibilities. Somebody despised Isabella enough to trace her to Alex's Vineyard retreat. Or the killer's intended victim was Alex, and Isabella was shot by mistake. If so, the assassin may try again, and the next time Alex may not escape.

With longtime friend Mike Chapman from NYPD Homicide as her temporary bodyguard, Alex must probe the Sex Crimes Unit records in the Manhattan Criminal Courts Building, searching the files of closed cases, pending sex offense complaints, and lists of convicts recently paroled. Somebody in one of those records may have hated Alex enough to wish her dead. Isabella, too, had her enemies, including a stalker who wrote letters and made threatening calls.

The hunt for the killer goes on, while Alex, with her characteristic intensity and humor, continues the gritty procedures of her daily life - witness and victim interviews, courtroom appearances, serial rape investigations, and late-night precinct meetings with cops and detectives.