One will need subtitles, as the film is in German. Aunt Claudia and Uncle Stefan and son Philipp live on an isolated farm in the countryside. Simi, a bit overweight is to visit and arrives the Tuesday before Easter, thinking she would stay through Easter. But she is informed that Easter is a very special and private time, and they didn't expect her to stay that long. Claudia is a nutrition expert, and puts Simi on a diet. Diet is the wrong term, as it is to be NO food until Easter, and she is then invited to stay longer. She has to share the room with Filipp, and it is clear he doesn't like her. Claudia says he has a personality disorder and often runs away. It is slow paced, very moody, and there are many undercurrents to the story. As Easter approaches, Stefan says he doesn't agree with the entire ritual, but it is very important to Claudia, so Simi should just go along with it. I can't really consider it a horror movie in the true sense, as there are no jump scares or other things associated with horror movies. It is decent movie, well acted but not really special.
Review of Family Dinner
