As dawn breaks on a chilly morning in November 1940, a car is found ablaze in an abandoned builder's yard a stone's throw from 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 Barings confectionery company. He liked to be known as Lucky Les, but it seems his luck has finally run out. DI John Jago discovers among Latham's belongings a mysterious photograph and some suspicious-looking petrol ration books that set Jago off on a murky trail of deceit, corruption and murder.