A police constable is shot and killed on a housing estate in Tower Hamlets. The following day another officer is shot dead on a street in Belgravia. Over the next three days three more officers are gunned down at apparently random locations in the Greater London Area. Someone has declared open season on the men and women of the Metropolitan Police Service, and Superintendent Ray Hawkins and his team of detectives begin a race against the clock to find the killer before he strikes again. But when one of his team is struck down ... ...that's when it gets personal