On a spring morning in 1951, eleven-year-old chemist and aspiring detective Flavia de Luce gathers with her father and sisters at the railway station, awaiting the return of her long-lost mother, Harriet. Yet upon the trin's arrival in the English village of Bishop's Lacey, Flavia is approached by a tall stranger who whispers a cryptic message into her ear. Moments later, he is dead, mysteriously pushed under the train by someone in the crowd. Who...