When horse trainer Annie Carson rescues a beautiful thoroughbred from a roadside rollover, she knows the horse is lucky to be alive. Unfortunately, the same can't be said about the driver. After rehabilitating the injured animal at her Carson Stables ranch, Annie delivers the horse to Hilda Colbert—the thoroughbred's neurotic and controlling owner—only to find she, too, has been permanently put out to pasture.

Two deaths in three days is unheard of in the small Olympic Peninsula county, and Annie decides to start sniffing around. She's confident she can track down the killer herself, but just because she has the skills to solve the mystery doesn't mean she's prepared for how ruthless this murderer really is.