Gail and Tom Hartman are struggling to stay together and decide to take a white-water rafting holiday adventure in Montana for their son Roarke's 10th birthday, only to meet up with a pair of mysterious men whose desperation grows, turning their vacation into a nightmare.

The story is set in the British province of New York during the French and Indian War, and concerns—in part—a Huron massacre (with passive French acquiescence) of between 500 to 1,500 Anglo-American troops, who had honorably surrendered at Fort William Henry, plus some women and servants; the kidnapping of two sisters, daughters of the British commander; and their rescue by the last Mohicans.

Tex rides to the rescue when badguys led by LaCrosse and Utah Joe kidnap Lettie.

Framed by Major Jenkins, Capt. Travers is kicked out of the Army. When Travers, now living with the Indians, is captured by Jenkins, the Indians attack the fort. With his men greatly outnumbered Colonel Burke realizes that Travers is their only chance.

At the end of the Civil War, a ragtag group of just-discharged Union soldiers clashes with a band of renegade Confederates over a golden treasure hidden in a deserted town in the Oklahoma Territory. Soon these rivals must make common cause in the face of an Indian attack.