The Law of the North.

When Edith Graham returns from school to live with her father, Lieutenant Graham, at a Northwest Mounted Police post in Hudson's Bay, she finds herself courted by two suitors, Corporal John Emerson and Reginald Annesley, the latter of whom is a wealthy purchasing agent for the post. Annesley however is also involved with the half-breed Marie. When Marie tells him she is carrying his child Annesley kills her and attempts to frame Emerson. However, Edith is suspicious and sets out to find the truth.