In the sixth installment of Margaret Coel's O'Malley mysteries, Father John O'Malley, a full-time spiritual councilor and part-time sleuth, unearths a skeleton near the Little Wind River. Intrigued by his mysterious finding, O'Malley once again teams up with attorney Vicky Holden to identify the remains. Subsequently, the duo finds themselves attempting to uncover the true story of Sacajawea, the woman who guided Lewis and Clark to the Pacific Ocean....

An exhibit of Edward S. Curtis's early 20th-century Plains Indians photographs has attracted a lot of visitors to the museum of St. Francis Mission on the Wind River Reservation. When someone shoots to death a descendant of a tribal chief shown in one of the Curtis pictures and the museum's new curator disappears, there could be a connection to a murder committed in 1907 on the reservation.