Demon, a Polish-Israeli film written and directed by Marcin Wrona, presents a haunting story centered around a young couple, Zanetta and Piotr (Agnieszka Zulewska and Itay Tyran respectively). Piotr’s an English-born groom just trying to fit in with his new Polish wife’s mildly xenophobic family. His attempts at speaking their language is rather awkward, but still, Piotr perseveres to become accepted in this new culture, including his insistence on moving into and renovating the rural home that the bride had inherited from her grandfather.
Piotr also plans to make a positive impression on his in-law’s by having a traditional Polish wedding reception (something the married couple never experienced because they previously only had a court wedding), which will also take place on the new property. But in the process, Piotr discovers a skeleton in the yard. From here, things progress rather expectedly.