Brian Sackett returns to the ranch in Abilene, Texas, while his identical twin brother, Brent, arrives in Sundown, Texas seriously wounded in a gunfight with Black Jack Haggerty. While Brent slowly recovers, Brian and his brother AJ begin following a small war party of Comanche Indians and several Comanchero renegades. When a US marshal and his deputy arrive at the Sackett ranch in search of Brent Sackett, the entire family learns the secret that Brian had hoped to keep from them; Brent is a wanted outlaw. Through a series of events, Brian and AJ learn that Brent might be in the small town of Sundown and head that way in hopes of catching up with him. But as is usually the case, there is trouble along the way. This is the third book in the 'new' Sackett family series; not to be confused with the Louis L'Amour characters.