It's?1952,?and?Tommy?and?Tuppence?Beresford,?an?ordinary?married?couple,??are?thrust?into?a?web?of?international?espionage?after?a?chance??encounter?on?a?return?train?from?Paris.
Tommy?and?Tuppence's?search?for?the?missing?Jane?Finn,?Brown's?identity??and?the?recording?gets?more?dangerous?as?they?struggle?to?maintain?their??cover.
Tommy's?cover?is?blown,?and?the?violent?criminal?gang?give?him?a?job?to??do.?Tuppence?comes?to?his?aid?as?they?try?to?prevent?an?assassination.