In the remote northern Canada snow, the relentless Charles Bickford stars as Sergeant Conniston, who tracks down an escaped convict named Keith, a man who is astonishingly played by the same actor, revealing a startling pair of look-alikes. Accompanying him is the hard-drinking guide O'Toole, brought to life by J. Farrell MacDonald. The moment Conniston corners his quarry, the discovery is chilling: the two men resemble each other so closely that the pursuit becomes a moral riddle as much as a manhunt.
Their return journey is cut short when their sled overturns, a calamity that forces Keith to seize Conniston’s gun and sled and abandon the policeman and his guide to the cruel, starving cold. The act seeds a growing guilt in Keith, triggering a complicated arc of remorse and improbable mercy. He turns back and ferries the injured pair to an emergency cabin, yet the fate of Conniston is sealed by a frozen lung, leaving Keith to face the consequences of his choice in solitude and doubt.
After a tense exchange, O'Toole shifts from suspicion to conviction, convinced of Keith’s innocence. He becomes Keith’s unlikely mentor, coaching him to pass himself off as the sergeant. But O’Toole’s own frailty prevents further travel, so Keith presses on toward the RCMP post on his own, driven by a dangerous blend of desperation and hope.
When Keith reaches the post, he tells McDowell, the commander, that he is the one who died. David Torrence plays the officer who reveals a deeper truth: Keith was innocent; the real murderer has confessed. Yet fear of being implicated in Conniston’s demise propels Keith toward the dangerous border, planning an escape that could destroy the fragile life he imagines.
Complications bloom. Miriam, McDowell’s daughter, portrayed by Evalyn Knapp, had once been Conniston’s lover but chooses a colder path after the warlike past. Keith is drawn to her and proves to be a far more romantic presence than Conniston ever was, and Miriam finds herself slipping into his orbit. Mickey, O’Toole’s young son, played by Frank Coghlan Jr., had looked up to Conniston as a surrogate father, and the boy gradually realizes that Keith is not the sergeant—but Keith gently persuades him to keep the secret.
As Keith seeks Miriam’s hand in marriage, a new truth surfaces: Conniston was married, and a jealous rival had spread rumors to sabotage the doomed relationship. McDowell orders Keith to depart the base in disgrace, but before he goes, Keith confesses the whole truth to Miriam. Refusing to sneak away, he faces a gauntlet of angry Mounties, enduring a harsh confrontation as he boards a ship, with Mickey at his side. In a last, poignant moment, Miriam herself boards the vessel, choosing to join them on the uncertain voyage ahead.
