Drew and Anne Heriot investigate the strange behaviour of Drew's brother, Frank, who has embroiled a senior politician in a scandal. They discover that Frank has been rendered emotionless, and that a number of other people have been similarly affected. All of the victims are highly susceptible to high frequency signals…
Drew and Anne visit a seaside resot, and discover that the local vicar is behind an invasion by rioting teenagers.
Drew is framed for the murder of a call-girl who had been involved with an M.P. and a social worker. Anne goes undercover to prove his innocence.
Drew and Anne uncover a plot to assassinate a former member of the I.R.A.
Anne and Drew track a suspect to Kimberley Vale, where they discover that the radio telescope is to be used as part of the brainwashing scheme.
Thousands of acres of Kent orchard have been poisoned, and the stock market is in disarray. Anne and Drew uncover a bomb plot intended to assassinate a celebrity during a live TV show.
Doctors in London have been committing suicide in large numbers, each having received a vinyl record with a personalised birthday greeting.
Children, influenced by a fictional character, are behaving badly. Anne and Drew suspect the author.
Drew is forced to co-operate with a scheme to help low-calibre candidates pass the Civil Service examination as Anne is held hostage.
Anne and Drew visit a clinic in Tunbridge Wells where they uncover a plan to infect the population with a new strain of the 'flu virus designed to make more people responsive to the brainwashing signal.
Security forces set to work rounding up the people on the list of the brainwashed, and the government prepares to jam the alien signal. The subversive element reaches into communications centre, however, and Anne and Drew are the targets of an attempted assassination.
