Publisher's Synopsis
It is 1916 and the allies are losing the Great War. Mycroft Holmes enlists the assistance of his brother, Sherlock Holmes, to investigate a female spy who is travelling too frequently between France and Germany. Holmes and Watson take off for the Western Front, disguised as army officers, but whatever action they take, the spy always eludes them. They are parachuted into enemy territory, only to discover that they are almost too late...