November 1940. As dawn begins to break, blackout regulations are rendered pointless by a car burning fiercely near the Regent's Canal in Camden Town, north London. In the burnt-out vehicle police find the charred remains of a body. The victim is Les Latham, a commercial traveller for the Baring and Sons confectionery company. He liked to be known as Lucky Les, but it seems his luck has finally run out.

Detective Inspector John Jago discovers a mysterious photograph and some suspicious-looking petrol ration books among Latham's belongings. These lead him off on a murky trail of deceit, corruption and murder. It seems that the Blitz Detective will have to make his own luck to bring to light an unexpected killer.