"I was thrilled to see Poirot in such very, very good hands."-- Gillian Flynn, New York Times bestselling author of Gone Girl

The world's greatest detective, Hercule Poirot--legendary star of Agatha Christie's Murder on the Orient Express and Death on the Nile--returns to solve a delectably twisty mystery.

Hercule Poirot is travelling by luxury passenger coach from London to the exclusive Kingfisher Hill estate. Richard Devonport has summoned the renowned detective to prove that his fianc e, Helen, is innocent of the murder of his brother, Frank. Yet, she readily confessed to the crime. What secret could possibly be worth hanging for?

The coach is forced to stop when a distressed woman demands to get off, insisting that if she stays in her seat, she will be murdered. Although the rest of the journey passes without anyone being harmed, Poirot's curiosity is aroused, and his fears are later confirmed when a body is discovered with a macabre note attached . . .

Could this new murder and the peculiar incident on the coach be clues to solving the mystery of who killed Frank Devonport? And if Helen is innocent, can Poirot find the true culprit in time to save her from the gallows?