Oil and gas magnate Nathan Moore's killer used Moore's pacemaker as a seemingly perfect means of execution. And a bombing at one of Nathan's oil rigs days earlier indicates his death could be part of a bigger conspiracy. Special Agent Tori Templeton's first order of business is separating the personal from the professional: the victim's wife, her best friend, is one of the FBI's prime suspects. With the newest member of the task force, recently reinstated Deputy US Marshal Cole Jeffers, Tori digs deeper into Nathan's personal and business affairs. They uncover more than they bargained for... and someone is intent on silencing them for good.