嗄 series of unexplainable accidents befall the people and companies responsible for developing the world's first supersonic airliner (SST①). 嗄 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. The evil Petersen has developed a number of robots (actually rather beautiirls 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.