Adventure drama following Texas Ranger Dusty Rivers (Gary Cooper) as he journeys to Canada, hoping to apprehend rebel and murderer Jacques Corbeau (George Bancroft). On his arrival, Dusty teams up with the Canadian Mounties, who are also looking for Corbeau. Soon friction stirs between the police and the Riel Rebels who are creating an army to fight against the Dominion of Canada. To make matters worse, Dusty has fallen for April Logan (Madeleine Carroll), who is involved with Mountie Jim Brett (Preston Foster). Meanwhile, April's brother, Mountie Ronnie Logan (Robert Preston), is in love with Corbeau's sister, Louvette (Paulette Goddard), who later decieves Ronnie. With so many additional complications, will Dusty and the Mounties ever catch the notorious outlaw?