In November 1932, a wealthy family hosts a weekend shooting party to entertain their relations, but things take a turn for the deadly when someone is discovered to have been murdered.
Northern England, 1912. The dinner of a wealthy family is interrupted by Inspector Goole, who only announces that a young woman has committed suicide. Then, he simply asks everyone present, one by one, if they knew her.
England, December 1926. Although her personal life is in tatters, the famous writer Agatha Christie decides to leave everything behind to help unravel an unsolved murder committed on a train six years ago, unable to imagine the disproportionate consequences that such a selfless act will cause.
Seventeen and pregnant, Felicia travels to England in search of her lover and is found instead by Joseph Ambrose Hilditch, a helpful catering manager whose kindness masks an unsettling secret.
Adrian Messenger, a famous writer, asks his friend Anthony Gethryn, a former British agent, to help him investigate the whereabouts of the people who appear on a list, without asking him the reason why he should do so.