In the late 1880s, Murial Robertson has the unusual job of being a part of her father's security detail. While trying to gain public support to make Arizona a state, the Senator receives a peculiar letter threatening his life and signed by "The Serpent." Trying to keep her controlling father alive, Murial heads to the town of Conestone where she implores the help of her cousin, Walter, and the town's sheriff, Jack, before her own life takes an...