After a genial spirit shows the benevolent Ebenezer Blackadder visions of his unscrupulous ancestors, he resolves to mend his generous ways.

In post-World War II Venice, Poirot, now retired and living in his own exile, reluctantly attends a seance. But when one of the guests is murdered, it is up to the former detective to once again uncover the killer.

Follows the story of Ruth Ellis: her lifestyle as a young nightclub manageress, her violent relationship with the man she then killed in cold blood, her arrest, trial, and subsequent legal battle to get her release before she was ...