When you can't help but howl

Montevideo, Uruguay. A handful of unsuspecting people go to see a horror movie. There's also a man in the audience who inspires a different kind of horror than in this fictional movie. Makes a great old-school slasher flick. The plot is a side story as long as there's blood splatter and horror takes over. The nuances are for other movies. Interestingly, the villain in the movie is played by Ricardo Islas, the same guy who directed the movie-within-movie Frankenstein: Day of the Beast (2011).