Ex-con turned private investigator Bradford Galt suspects someone is following him and maybe even trying to kill him. With the assistance of his spunky secretary, Kathleen Stewart, he dives deep into a mystery in search of answers.

The U.S. government recognizes land grants made when the West was under Spanish rule. This inspires James Reavis to forge a chain of historical evidence that makes a foundling girl the Baroness of Arizona. Reavis marries the girl and presses his claim to the entire Arizona territory.