A serial killer who drains his victims for blood is on the loose and London police follow him to a house owned by an eccentric scientist.
Philip Scott, the boss of a toy company, is secretly also the chief of a British spy organization. Scott's cover is destroyed when enemy agents kidnap his girlfriend to force him to reveal the identities of his fellow spies.
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.
