They were deeply in love, their days and nights filled with scintillating romance and passionate love making-even after 20 years of marriage. Then fate delivered a hammer blow when a heart attack led to Mark's impotency and Shelley's unbearable frustration. Encouraged by a friend, Shelley becomes flirtatious and unfaithful, finding those moments of glorious intimacy for which she hungered with another man. Mark, a police chief, suspects nothing as he channels all his time and energy into tracking down a serial killer.

But when the murderer leaves a terrifying final clue too close to home, only Shelley can solve the case.