Dave Osborne, deputy marshal, in outnumbered but not outwitted as he bucks the whisky traffic to the Upper Missouri Indians. Assisted by an Indian-Joe, and assisting a girl running her father's trading outfit, Dave also taken on two freighters, an Honorable Indian Commissioner turned dishonorable, and an Army Lieutenant- all culpable- and backs up his badge with a gun.... A brisk pace all the way.