After a long service, it's time for Major Wingate to retire. But the major is soon forced to send a telegram to Tex: the Indian Nantay has been murdered, and the crime is being covered up by a local powerful man and a drunken sheriff. Tex and Carson come
While waiting for Tex and Kit in the small town of Tucson, Carson kills a member of a gang that previously robbed and killed Montana gold diggers. Carson leaves a message for Tex and starts a new hunt for bandits. Following Carson, Tex tells his son Kit a
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.