A Haunting in Venice is the latest of Kenneth Branagh's Poirot mystery films, where he plays the legendary detective himself. It is based on a novel called Hallowe'en Party by the legendary Agatha Christie, who is considered one of the greatest mystery writers of all time. A Haunting in Venice sticks to Christie's tale while adding some extra supernatural elements and the underlying story of Poirot's mental health.
Source：https://www.cbr.com/a-haunting-in-venice-poirot-mental-health-story/
