As the man lay dying he uttered five words which were the code names of Hitler's prize agents. Tommy and Tuppence travel to the seaside resort where he was killed to track down the killer and possibly stop the espionage ring.
After the outbreak of the Second World War and many years after they worked for British intelligence, Tommy and Tuppence Beresford feel useless and sidelined. When Tommy alone is approached to go undercover once more, however, Tuppence decides to join him on his mission whether invited or not. Through good sleuthing she learns where he is to be sent and actually arrives there before him. They begin a search for German fifth columnists. Another British agent that was following these Germans left a cryptic message on his deathbed: "N or M. Song Susie". Grant knew that "Song Susie" stood for Sans Souci, a hotel in the fictional seaside Leahampton, based on Bournemouth; "N" and "M" there were two German spies, one male and one female.
Written by Agatha Mary Clarissa Christie (1890-1976)
Dodd, Mead and Company
ISBN 425 09845