There has been a break-in at the county council office. At first it seems that nothing but petty cash was taken, but then it is discovered that an adoption file is missing. When the child of that file is abducted suspicion falls on its biological mother Sandie Eliot. Only the abducted child is not hers! Greengrass reports a murder. One of his homing pigeons has been killed by a peregrine falcon, and when the police will have nothing to do with it he and his fellow members of the local pigeon fanciers association decide to take matters in their own hands.

Somebody tries to break in at Jean and Derek Lester's cottage. Derek does not want to report it, because nothing was taken, but his wife is sure she heard voices. Dr. Merrick discovers that her patient William Seaton is being blackmailed. He has paid 300£ and left the money in a telephone box in Malthouse Street. He is not the only victim of the blackmailer. So is Barry Jones, who runs a refuge next door to the telephone box, and Mrs. Ventress' goddaughter Susan. The only common denominator to all three of them is Derek Lester who becomes the prime suspect, but he is being blackmailed too. Vernon Scripps has an appointment with the famous publisher Howard Dufton. Dufton wants Scripps to sell advertising space for a new magazine, but the new magazine may never happen because Dufton is nearly bankrupt. Vernon Scripps has an idea that might save him.