Royal Canadian Mounted Police (RCMP) Trooper O'Brien assists Kate Owens when her car breaks down. Upon arrival at headquarters, his Inspector-in-charge assigns him to escort Kate to visit her Uncle in Morgan's Post located in the backwoods. As there are no roads to the area the two must travel by horse. O'Brien has two other tasks when he arrives; to discover why RCMP Sergeant Means has not filed a report in months and to investigate the complaint of Poodles Hanneford who alleges that the river going through his property has been blocked off and he has been fired upon when investigating.
What begins as a screwball comedy film between the witty Kate and strait-laced Mountie takes many unexpected turns when a rider steals Kate's suitcase that contains $20,000 but the rider is found shot to death with the money missing. Upon arrival in Morgan's Post Sgt Means chastises O'Brien for his incompetence and orders him back to headquarters.