British agent Bulldog Drummond is assigned to stop a master criminal who uses beautiful women to do his killings.

A series of unexplainable accidents befall the people and companies responsible for developing the world's first supersonic airliner. A British agent is sent to investigate and with the help of another agent uncovers a plot masterminded by Carl Petersen who stands to gain eight million pounds if the aircraft is not ready by a certain date.

A young man travels to Prague to join his new employer, unaware that he is being used as an espionage courier.