Paleontologist Dr. Arthur Calgary visits the Argyle family to give them an address book that belongs to Jack Argyle. But he is told that Jack has been executed for the murder of his wife. But the address book can prove that Jack was innocent, so Dr. Calgary starts the investigation all over.
Once the murder was solved, the real mystery began...
Did You Know?
The movie was "set in her [Agatha Christie
's] favorite [English county] Devon from her favorite book" according to Halliwells. See more