WDC Linda Doran working as a journalist. DC Derek Willis helping out at a coroner's office. It's all part of an investigation to find out whether the death of a newspaper man was an accident or murder.
Assigned to investigate a betting racket, Bullman takes a job in a betting shop, while WDC Doran finds employment while a professional gambler. It isn't long before the detectives discover a link to the horse-racing world.
Is a uniformed police sergeant, suspected of being crooked, really guilty? Bulman poses as a copper on the beat to find out what has led the sergeant to be suspected of being 'dirty' - but finds that an ordinary policeman's lot is not a happy one.
When a petty crook finds a hoard of hot money and begins to receive unwanted attention from the villains who stole it, Bulman finds himself moving in with the man's family to protect him.
Convinced that a local politician is taking bribes, but frustrated that his enquires have brought no results. DS Singer assigns Willis and Doran to pose as newly-weds and move into the house opposite.
Bulman and Willis find themselves investigating the theft of a mailbag from a postman. A straightforward case? Not when their enquiries point to something fishy afoot.
Day one. Willis is working on a diamond robbery. Bulman and Doran are trying to track villains who are systematically beating up nightclub hostesses. The two enquiries lead in one direction and the CID team find themselves working together on the same problem.
When counterfeit Deutschmarks flood Germany and the CID officers try to establish a connection in England, they find themselves facing violent and ruthless opposition from a gang with murder on their minds.