Robert and Donald Cameron are twins in a Scottish family which is separated by the death of the mother. Robert is brought to America by his father, and Donald is adopted by a family named McNish. Robert prospers in the new land, but Donald goes to the bad, runs away to sea and becomes a smuggler of Chinese to America. On one of his expeditions he scuttles a junk, or Lorcha, and a hundred Chinese perish. The only survivor is the cook, a half-breed, John Soy. Soy and an Irish soldier of fortune. Murphy, aid the kinsmen of the dead in a world-wide search for McNish. One day Murphy sees Cameron, mistakes him for his brother, McNish, and puts the avengers on his track. Cameron, who has a fine Connecticut estate, receives a warning from the Chinese, the only signature being a silhouette of the Sable Lorcha, or funeral ship. Apparently before his very eyes his portrait has been beheaded. A second warning is received