The story of the widow of Lee Harvey Oswald, the man accused of shooting President Kennedy. Via flashbacks, the story traces the woman's life from her days in Russia, the turmoil following the assassination, raising her family, and coming to grips with the fact that she too may have been a pawn in a grand conspiracy.

Among the issues Walker has to deal with: a new partner named Trivette, a group of men terrorizing a circus family who camp out at his home, and some bad guys who plan on the ultimate bank caper.

Modern-day Texas Ranger, Cordell Walker's independent crime-solving methods have their roots in the rugged traditions of the Old West. Walker's closest friend is former Ranger, C.D. Parker, who retired after a knee injury, and now owns "C.D.'s," a Country/Western saloon/restaurant. Rookie Ranger, James "Jimmy" Trivette is an ex-football player who bases his crime-solving methods on reason and uses computers and cellular phones. Alex Cahill is the Assistant DA who shares a mutual attraction with Walker, but often disagrees with his unorthodox approach to law enforcement.

A showdown is staged between a U.S. deputy marshal and the outlaw gang that raised him in the New Mexico Territory of 1887.