As a surgeon, Dr. Rennie Newton is the consummate professional. When she's summoned to jury duty, she brings competence and composure to the courtroom — a skill she learned while performing surgeries. It is this commitment to precision that compels her to deliver a not guilty verdict in the murder case against notorious contract killer Ricky Lozada. It will be the most regrettable decision of her life. When a rival colleague is brutally slain, Lozada's menacing shadow looms over the murder, but the investigators pinpoint Rennie as the prime suspect. Soon, the police begin violating the privacy she has cultivated and protected at all costs. And when Lozada begins an earnest courtship, it becomes terrifyingly clear that he is obsessed with having her. Wick Threadgill is a detective on indefinite leave from the Fort Worth PD with a very personal agenda for the contract killer. Temperamental, bitter, and driven by loyalty and love, Wick is determined to destroy Lozada. In order to defeat him — and save their own lives — Rennie and Wick form an uneasy alliance. Mistrustful of each other, they know only one thing with absolute certainty: like one of Lozada's prize scorpions, they won't see it coming when this killer strikes.