SPOILER ALERT
Travelling to California to purchase horses for his ranch, at the Double J Ranch near Paso Robles puts Kevin Kerney smack in the middle of a murder. Another buyer in the room next door, Clifford Spalding has died of what initially looks like a natural causes. But the investigating officer, Sgt. Elena Lowrey, doesn't take any chances and treats it as suspicious. Kevin becomes her prime suspect when it looks like it could be murder, and Claudia Spalding, the wife, turns out to be a resident of Santa Fe part of the time. After all Kevin's wife isn't around much, and her husband wasn't either. Once the assistance of Kevin and his team determines that Claudia at that moment is on a trip with a single man, in the New Mexico mountains, Kim Dean, the boyfriend of several years who becomes the new suspect. He is a pharmacist, and it appears that the thyroid disease Mr. Spalding suffered from, and the medication he took for it, may have been the means for the murder. Kim Dean is a pharmacist. A search of the pharmacy and his home reveals that not only did he have left over components for making pills that resembled Clifford's medication, he also was in the business of selling drugs to fake patients forged on other doctors' slips. He is arrested, but refuses to implicate Claudia, thinking she will provide a good lawyer for him.
The police in their investigation find other individuals who are suspected of being part of a drug network that the DEA is looking into, through the undercover work of SA Evan Winslow, who is acting the part of a wealth management representative. They arrest Mitch Griffin as part of the network which leads to others, and also puts Det Sgt Ramona Pino in a pickle for testimonies against Claudia. She is arrested but technicalities get her out of jail, after which she returns to her Montecito estate only to be picked up by and disappear in a helicopter. A search of her home reveals a diary that supports her wanting Clifford out of her life. She writes very explicit descriptions of her sexual activity with her lovers, allowed by an addendum to the prenuptial agreement as long as she doesn't reveal it, and has an extensive collection of erotica that helped to move Kim Dean into the position of lover and killer.
During this investigation, Kevin has become involved in the financial setup of the Spalding estate. Clifford had been married to Alice, who has a complex agreement with his as part of their divorce settlement that gets her a third of his estate on death. Part of his discovery is that Alice doesn't believe that her son George was killed in Vietnam as reported. His research reveals that Clifford had been using a variety of people to support his coverup that George is still alive. George had been involved in gemstone smuggling but there had not been enough evidence to convict him. His record with the military was not good. He handled the disposition of the dead. Easily in a position to substitute another body for his own. His smuggling apparently was the basis for his father's start in the hotel business that had grown to a multimillion-dollar enterprise. Clifford involved the previous Chief of police of Sann Luis Obispo, Ed Ramsey, now an instructor at the FBI Academy. When Kevin visits Sara in D.C., he finds Ramsey living large. The current Chief Capt Dick Chase is also part of the conspiracy. Research by Agent Joseph Valzez reveals that each of them had been bribed with a $100,000 each year for 15 years to keep the conspiracy going. While they do not find George before the end of the story, they do find his former girlfriend, Debbie Calderwood. She tells the police that Alice had sexually abused George when he was a child and he hated her, never wanting to see her again. Alice is deep into Alzheimer's at that point.
In the end, Kevine gets his horses, including Comeuppance, a stallion, and two geldings and a mare to start is enterprise. He gets is longed-for visit to Sara and Patrick and turns in Ed Ramsey. When an aha comes to him about where Claudia may have fled to, he remembers the cabin that Dean had in the Canadian River Canyon lands. He and the local sheriff, Lucky Suazo follow her to the cabin and arrest her, but not before she tries to kill Kevin, stepping on his hand as he climbs the mountain after her. She breaks a number of his fingers before the two lawmen capture her and take her back.
During all this for Kevin, Sara is faced with a new project in her position at the Pentagon, to cover up the lack of justice for a large number of women in the military who were sexually assaulted. She is to provide a report, and to propose new procedures for ongoing investigations and prosecution but ignore the past closed cases. She focuses on the cases still open, knowing that her supervisor will not like the outcome in her report. The story ends with her satisfied she has done what she could to bring justice to the women. We don't know the outcome of the report.