Alan Garnett is the chief investigator for the International Air Security Board,based at the Zero one headquarters at London airport,with his young American assistant Jimmy and secretary Maya. When pilot Peter Elkinson appears to be suffering from memory lapses and his domestic situation is not what it should be,he is likely to put his passengers' lives at risk and Garnett is brought in to help him sort himself out.
When an airfield manager refuses to lend his fire engine to the local villagers fighting a fire at the local pub, resulting in the pub's destruction, the townspeople lay siege to the airstrip. Alan Garrett is called upon to straighten out the mess.
Alan Garnett is personally escorting an extremely valuable painting on a flight from London to New York,where it is to be exhibited. However,on arrival at his destination Garnett is told that the painting is actually a forgery and he resolves to retrace his steps in order to find the original and work out how and where the switch was made.
Greek Tina Stavros arrives in London from New York in order to get married but there is a very great state of confusion at the airport. The very vocal Kadopolis family have arrived to meet Tina, but they actually have two sons,so one is destined to end up empty-handed. A very reluctant Alan Garnett is brought in to act as a marriage broker and work out which is the husband for Tina.
Garnett and Delaney are investigating an illegal adoption racket in which children from Italy are smuggled across to America. In the course of their enquiries they come across a children's home which is immaculately run by the highly charming 'Uncle George'. But this delightful old man could well be a sinister link in the illegal chain.
Garodo is a wholly unimportant Middle Eastern town with a small and far from busy airport,not the sort which is used to seeing important passengers come and go. So how is it that Brodick, a man known to be a professional assassin, is waiting around it so doggedly and what is his connection with the seemingly ordinary English couple,the Langfords?
Russian concert pianist Vladimir Petrovsky lands in London and immediately claims political asylum. He is placed in the care of Garnett and the two men establish a friendship. However both Garnett's friend David Roberts and MI5 man Atkins lead him to suspect that the musician's desire to defect is a sham and he is really a Soviet agent.