1892. Amid the chaos and corruption of Wyoming's Johnson County War, famed lawman Michael O'Rourke, framed for murder and sentenced to prison, mounts a desperate escape to Mexico where he builds a new life as a respected rancher, husband, and father. But when his pregnant wife is savagely killed, and his daughter abducted, O'Rourke must resurrect the man he once had been and confront the personification of evil who reigns with impunity just beyond his last strand of barbed wire.