Tannöd (2009)

Deep within a blue-black forest lies the secluded murder farm. It was here that the entire Danner family, including their children and the new servant, were brutally murdered. Two years later, when the 26-year-old nurse Kathrin turns up in the village, the killer still hasn't been found. She soon discovers that behind the tightly woven web of lies and silence lays a deep sense of guilt in the village and she realizes that this case has much more to do with her than she would have liked to admit. (the-match-factory.com)