'De Kasteelmoord' drags the viewer into an intense family feud that takes place behind the castle walls between Stijn Saelens, descendant of a very wealthy family, and his father-in-law André Gyselbrecht, a popular village doctor. The feud ends in the murder of Stijn, who is reconstructed in 'De Kasteelmoord' and will not leave the viewer untouched. The research and the process, after which many questions remain unanswered, are also re-examined. This is done on the basis of conversations with people who followed the case from the front row. Lawyers Walter Damen and Kris Vincke and journalists Faroek Özgünes (VTM NIEUWS), Klaas Danneel (VTM NIEUWS), José Masschelin (ex-HLN) and Cedric Lagast (Het Nieuwsblad) guide the viewer through the murder case.