Ely Parker leads an investigation into corruption within Native American agencies. Tex Willer and Kit Carson help him in this investigation by taking the four chiefs to Washington. In their way are criminals led by Mike Thompson, who works for the mysteri
Willer and Carson are drawn into a great intrigue, connected to the assassination of Abraham Lincoln, the public disclosure of which could lead to major upheavals in the highest circles of government.
A military patrol carrying pay to Fort Gila is attacked, the soldiers are brutally murdered and scalped. Evidence points to an Indian ambush, but the fact that the money is missing makes Tex and Carson suspicious, and they begin to investigate...