It is World War II, and while the RAF fights to keep the Luftwaffe at bay, Britain faces an even more sinister threat from within: the 'Fifth Column'—Nazi moles and saboteurs.With the official intelligence service heavily compromised, the aging Tommy and Tuppence Beresford are secretly recruited for a dangerous undercover mission. They must travel to a seemingly quiet seaside boarding house in Leahampton called Sans Souci. One of the colorful guests or staff members is a high-ranking German agent code-named either 'N' (a man) or 'M' (a woman).Tommy and Tuppence must use all their wit, charm, and investigative skills to unmask the traitor before Britain falls from within.







