A first-class ticket, a fatal blade hidden on a speeding train, and a chilling secret left where nobody would ever think to look - welcome aboard a journey straight into terror. When a gruesome discovery is made beneath the seat of a first-class carriage on the Plymouth Express, a chilling panic grips high society. With Scotland Yard chasing dead ends and a web of cunning deceptions, an eccentric, sharp-minded private investigator steps in to crack the case. Ride along as this brilliant detective and his loyal companion unravel a fast-paced puzzle box of false alibis, hidden motives, and clever disguises. Packed with high-stakes tension and classic golden-age misdirection, this gripping mystery will keep you guessing until the final, shocking confession. Hold your breath and secure your valuables, because the killer might just be sitting in the very next compartment! Note: This independent audio recording is based on the 1923 U.S. public domain text and is not affiliated with, endorsed by, or connected to the Agatha Christie estate or any official publisher.