Wilczyca" by Marek Piestrak is arguably the most famous Polish horror film. Unfortunately this atmospheric flick is not well-known abroad. The action of "Wilczyca" takes place in Poland in the ninetieth century. Maryna dislikes his husband, a Polish patriot named Kacper. Before her death, she curses him. Her evil is transformed not only into a young countess Julia, but also into the wolf... "Wilczyca" is definitely a Polish horror classic that reminds some Hammer productions. The film is loaded with traditional genre elements like tombs or silver bullets. The climax is surprisingly gory and the mood is quite sensual.

Overview from themoviedb.org