In the summer of 1932, the career of psychologist and investigator Maisie Dobbs takes an exciting new turn when she accepts an undercover assignment from the British Secret Service. Sent to pose as a junior lecturer at a private college in Cambridge, she will monitor any activities "not in the interests of His Majesty's government."

When the college's controversial pacifist founder, Greville Liddicote, is murdered, however, Maisie is directed to stand back as her colleagues in Scotland Yard spearhead the investigation. But she soon discovers that the circumstances of Liddicote's death appear inextricably linked to the suspicious comings and goings of faculty members and students under her surveillance. To unravel this web, the investigator must overcome a reluctant Secret Service, discover shameful hidden truths about Britain's conduct during the Great War, and face off against the rising power of the Nationalsozialistische Deutsche Arbeiterpartei--the Nazi Party--as the storm clouds of World War II gather on the horizon.