A Haunting in Venice is a 2023 American mystery film produced and directed by Kenneth Branagh from a screenplay by Michael Green loosely based on the 1969 Agatha Christie novel Halloween Party. The film serves as a sequel to Death on the Nile (2022) and is the third film in which Branagh reprises his role as the Belgian detective Hercule Poirot. The movie is set in post-World War II Venice on All Hallows’ Eve and features Poirot attending a séance at a decaying, haunted palazzo. When one of the guests is murdered, the detective is thrust into a sinister world of shadows and secrets. Although the film is based on the novel Halloween Party, it diverges significantly from the plot of the book.