On assignment for the Bureau of Investigation in the summer of 1927, Trey Ramsey seeks information regarding the disappearances of young Sioux women from their reservations in the Black Hills of South Dakota. Meanwhile, young rancher Kate Connolly is at the right place at the right time to thwart an assassination attempt on the President of the United States, who has made the State Game Lodge in South Dakota his "Summer White House." As the stakes rise, Trey must untangle how his investigation is related to the attack on the president, and he and Kate must solve the puzzle of their entwined histories. Twilight of the Coyote grips the reader, painting a picture of the West after it was "Old" . . . but nevertheless still "Wild."