The River's End plot
After a three-year hunt, Canadian mounted police officer Derwent Conniston captures his prey, John Keith, the accused murderer of Judge Kirkstone. Before they can return to the post, Conniston falls ill and is nursed by his prisoner who entrusts the Mountie with the story of his justified attack on Kirkstone when the judge threatened Keith's father. The Mountie believes him and, knowing that death is near, suggests that Keith, who bears a remarkable resemblance to his captor, assume his identity. Keith does this and upon returning to his post announces the death of his prisoner. The deception convinces everyone except Shan Tung, who remains silent because he knows the identity of the true killer, Kirkstone's son Peter.