"Clarence Wilkinson and Jenny Matheson make some unofficial enquiries about the wellbeing of a soldier based at Overton in Hampshire who although only slightly injured in a road accident has been posted to Wales to convalesce. It is 1941 and the young man's father believes that the military authorities are not telling him the whole truth. The discovery of an excellently forged ten-shilling note points to the possible existence of a Nazi counterfeiting operation in the Overton area. Jenny goes undercover as a school secretary at the girls' boarding school adjacent to the military site. Meanwhile Clarence follows a line of enquiry initiated by the murder of an army deserter in Hackney who was in possession of a substantial quantity of the brand-new forged notes."