"On a sunny afternoon in late June, Cambridge professor Joseph Reavley is summoned from a student cricket match to learn that his parents have died in an automobile crash. Joseph's brother, Matthew, as officer in the Intelligence Service, reveals that their father had been en route to London to turn over to him a mysterious secret document - allegedly with the power to disgrace England forever and destroy the civilized world. A paper so damning that...

Presents a thriller set against the helligh backdrop of World War I Britain, as a beautiful Irish spy plies her trade in a London nightclub and, in a secret remote laboratory, scientists work to develop a weapon that could end the war.

With the war coming to a close, chaplain Joseph Reavley and his family learn that the identity of the sinister ideologue called the Peacemaker is about to be revealed by a German counterpart, but the family must first solve the mystery of a murdered nurse.