Based on the real-life experiences of Ed Horman. A conservative American businessman travels to a South American country to investigate the sudden disappearance of his son after a right-wing military takeover. Accompanied by his son's wife he uncovers a trail of cover-ups that implicate the US State department which supports the right-wing dictatorship.
After a cavalry group is massacred by the Cheyenne, only two survivors remain: Honus, a naive private devoted to his duty, and Cresta, a young woman who had lived with the Cheyenne two years and whose sympathies lie more with them than with the US government. Together, they must try to reach the cavalry's main base camp. As they travel onward, Honus is torn between his growing affection for Cresta.
An aging Pat Garrett is hired as a lawman on behalf of a group of wealthy New Mexico cattle barons--his sole purpose being to bring down his old friend Billy the Kid.