A series of unexplainable accidents befall the people and companies responsible for developing the world's first supersonic airliner(SST1). 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 certaindate. The evil Petersen has developed a number of“robots”(actually rather beauti***irls with“electronic brains”)to help him sabotage the SST1 project by means of“infrasound”(extreme low frequency sound waves)which can be directed at people or objects with devastating results.