The wealthy world of the Palm Beach horsey set seems a long way from a cop's world in the narcotics division. A lifetime ago, undercover sheriff's detective Elena Estes worked the mean streets and back alleys, living by her wits and playing the long odds until she took one risk too many. Now Estes lives on the ragged edge of lost hope and self-hatred, hiding from the past and believing she doesn't deserve to have a future. But the past is about to come back with a vengeance, and the future is about to become a race between life and death.

A young woman is missing and her 12-year-old stepsister comes to Estes for help. No one but serious, studious Molly Seabright seems concerned about what's happened to her troubled older sister. Estes has no P.I. license, and no desire to break her self-imposed exile. But the more she learns about the people Erin Seabright was involved with, the more her long-dormant cop instincts come back to life.

One trip to the showgrounds where Erin worked as a groom, and Estes is quickly pulled to the dark side of a glamorous sport. Behind the ultra-rich facade is an ultra-ruthless world of drugs, payoffs, and dirty deals. And in that world stalks a killer who will lead Estes down a twisted trail of mayhem and murder to a final showdown that could cost her everything. A race against time and evil. A race in which Estes is the dark horse...and no one is betting on her to win.