A murdered heiress. Missing jewels. A killer hidden among the passengers.

When wealthy American heiress Flossie Halliday boards the Plymouth Express carrying a fortune in precious jewels, she expects nothing more than an ordinary journey. Instead, her body is discovered concealed beneath a train seat, her valuable diamonds vanished without a trace.

Determined to uncover the truth, Flossie's powerful father turns to the one man capable of solving the impossible: Hercule Poirot.

As Poirot follows a trail of deception, greed, and betrayal across England's railways, he encounters a cast of suspects that includes fortune hunters, estranged spouses, and charming aristocrats. With every clue pointing in a different direction, the celebrated Belgian detective must rely on his legendary powers of observation and deduction to identify a murderer who believes they have committed the perfect crime.

Originally published as one of Poirot's earliest cases, The Plymouth Express Affair showcases Agatha Christie's masterful ability to weave together murder, mystery, and misdirection. Beautifully narrated by Agatha Wells, this classic detective story remains a captivating example of Golden Age crime fiction