Plot

Jen Galbraith is in love with Sgt. Tom Flaherty of the Royal Mounted. She is the daughter of Peter Galbraith, who is engaged in smuggling moonshine whiskey across the Canadian border. When she tries to warn her father and brother of the approaching police, she is arrested with the entire gang. Released on bail, her brother Val in an altercation shoots Snow Devil, a police spy; and trying to cross the border, he is caught in a blizzard. Flaherty is sent to intercept him but is drugged by the girl's father; Jen, however, braves the storm and delivers his dispatch. Flaherty later arrests Val on the murder charge, but the dying confession of his friend, Pierre, clears Val; and the lovers are happily reunited.—Pamela Short

Jen Galbraith is in love with Sergeant Tom Flaherty of the Royal Canadian Mounted Police. Two other men covet Jen: Snow Devil, a half-breed, and "Pretty Pierre," a bootlegger. Her father, Peter, and her brother, Val, are members of a group who smuggle whiskey across the border into Montana.

Jen tries to get Tom to leave the service, but he will have none of that. Due to his absences from the station to meet Jen, he gets in wrong with his superior officer. As Jen is riding home from meeting Tom, she is mistaken for a moonshiner and is pursued by the Mounties. She escapes, unrecognized, but one of the officers tracks her down due to a broken shoe on her horse. Tom arrives with another group of Mounties, and when illicit liquor is discovered, he is forced to arrest Jen's father and brother. This causes friction between Jen and Tom. The Galbraiths are released on bail, and on the eve of their trial, Peter Galbraith orders Val to tell all the moonshiners to bring in all the liquor. He plans to get it across the border and jump bail. At the moonshiners hideout, Val has a fight with Snow Devil, and in an ensuing gunfight, Val kills Snow Devil. The moonshiners then discover that Snow Devil was working for the authorities, and that Val will hang if captured. Snow Devil's death is reported, and Tom is given sealed orders to deliver to a post, so that a posse can be formed to arrest the killer, although he does not know it is Jen's brother. Tom sets out in a blizzard.

Peter Galbraith learns that Tom is carrying orders to arrest Snow Devil's killer. He drugs Tom, but before Tom goes under, Jen learns enough to convince herself that Tom was never disloyal to her. To protect his honor, Jen disguises herself as a Mountie and delivers the arrest orders. When she returns, she is met by her father and Pretty Pierre, and as Tom awakens, she tells them she delivered his orders. She then learns in horror that the orders means her brother's death.

Meanwhile, Val is trying to make his way to the border, but is pursued by Mounties. Tom arrives and pretends Val is his prisoner, and then informs his comrades that effective in half an hour, he will no longer be a Mountie. When the time arrives, Tom knocks out one of the Mounties, disguises himself as Val, and flees. Val, accompanied by Jen, their father, and Pierre, escapes across the border into the United States. Tom is captured, but Pierre, attempting to save him, is shot. As he is dying, he tells the Mounties that it was he who killed Snow Devil. The authorities declare the incident closed. Eventually Tom and Jen are reunited.