Dr. Fu Manchu poisons the renowned Dr. Hu Yan, who is to appear at a conference of the nations of the world, and replaces him with an impostor who disrupts the conference's goal -- a plan for world peace.

In his search for a treasure of gold, Dr. Fu Manchu commits a brutal murder; he sends one of his assassins to finish off the only witness to the crime, who happens to be the victim's wife.

An evil genius and possessor of seemingly unlimited financial resources, has pledged to bring about the downfall of western civilization to avenge unknown wrongs of the past.

An evil genius and possessor of seemingly unlimited financial resources, has pledged to bring about the downfall of western civilization to avenge unknown wrongs of the past.

Dr. Fu Manchu steals a deadly collection of germ cultures from a laboratory in San Francisco and plans to smuggle it through the port of Hong Kong.