Donna Morris has chosen to do her probationary year as detective constable in the small seaside town of Scarborough. But on her first day, a body is found in the woods: the corpse of Henrik Gr nttor presents itself as that of a homeless man, dead from his own drug use. However, until recently, Gr nttor had been working at the local GCHQ centre on the Russian section and the postmortem reveals the cause of his death to be uncertain.