Deighton's protagonist is nameless; this is maintained through all the sequels (although later in the series called "Charles"). Early in the novel we learn that he worked for Military Intelligence for three years before joining his present agency – WOOC(P) – as a civilian employee. WOOC(P) is described as "one of the smallest and most important of the Intelligence Units". (It is never stated exactly what the initials stand for, although his previous boss refers to it as Provisional.) We also learn in passing that he is from Burnley, Lancashire, and that he was born in 1922 or 1923.