Rod Drew (John Wayne) agrees to help locate a friend's missing brother and his niece so he sets off to the Canadian Northwest, the last known location of the two. Along the way, Drew must rescue his friend from a false accusation of shooting a card shark, by jumping off a train and end up finding a skeleton with a map to a mine. Taking the map, the two men make it to the local general store and ask the owner to lock up the map for safe keeping, not knowing that others have plans for stealing the map and taking the mine.