With her agency going great guns, Sharon McCone is known
as one of the best detectives in the business ... until
her untarnished reputation is threatened by an impostor. A
mysterious woman is handing out McCone's business cards,
advising clients, and picking up men for intimate
encounters. The woman's physical resemblance to McCone is
uncanny. Her knowledge of McCone's life is chilling. More
than professionally damaging, the situation is deeply
disturbing even to the experienced McCone. Who is this
strange woman and what does she want? To make matters
worse, McCone's office manager, Ted Smalley, has been
acting so oddly that his live-in lover asks McCone to
investigate. With her own lover, Hy Ripinsky, away on
business and an impersonator invading her life, McCone
reluctantly agrees. Spying on Ted soon has her pondering
the extent of a person's right to privacy. Then the issue
is brought home when McCone's double breaks into her
house, interferes with her family, and leads McCone on a
terrifying game of cat and mouse through the bizarre
nightside of San Francisco. Just as McCone begins to
uncover Ted's desperate problem the impostor escalates her
dirty tricks. With her professional detachment fast giving
way to blinding rage, McCone must go one on one against an
enemy with a sinister motive, an insidious plan ... and
the kind of violent craziness that even a seasoned
investigator may not foresee - or stop in time.