In this espionage drama, a Secret Service agent must discover who has been smuggling British arms into China. The prime suspect is a prosperous Chinese merchant-philanthropist and the agent thinks the merchant is working with the notorious Chinese guerilla warlord General Ling.

James Martin and Carol Wall have plans to elope, but a fight with her father's solicitor ends in murder committed by an unknown third-party, and Martin is hunted for the crime, knowing the solicitor was alive when he left him. Carol refuses to speak to him, and he escapes on a ship to South Africa. There, he is the victim of an accident that disfigures his face, and he returns to England to clear his name, believing he won't be recognized. Other than by everybody who knew him, it turns out.

In Mexico, a financier on the run poses as a man he just murdered, only to find out that the man was also a murderer.