It doesn't seem engaging at first. Seems to have a rather slow start. Not moving fast enough. Not thrilling enough. But you sit through the first hour, registering the numerous characters in your head. Each of them seems to have had the reason to commit the murder. Most belong to the same family, that makes it certain that it is indeed an insider's job. You think it through yourself, as the police and detective does in the movie. You are being taken on a ride.