N or M? by Agatha Christie

Extended Synopsis

Set against the tense backdrop of World War II, Agatha Christie’s classic thriller pulls retired sleuths Tommy and Tuppence Beresford back into the perilous world of intelligence. Appointed as spies by the British secret service, the duo is dispatched to a seemingly quiet seaside hotel teeming with colorful guests.

Their mission is both vital and deadly: identify two highly placed Nazi operatives, a man and a woman known only by the cryptonyms "N" and "M." With the threat of an imminent invasion looming, Tommy and Tuppence must rely on their sharp wits and unbreakable bond to unmask the traitors hiding in plain sight before it is too late.