I did see this Spanish (meant to be) slasher out, but I was totally worn out afterwards: it's (fortunately not too long) 75 minutes of totally chaotic running around of 5 persons, locked-up inside some isolated villa (from the outside it's like a post-modern bunker made of concrete), everybody either chasing, or trying to escape from everybody else, hitting and stabbing at each other with whatever they can find, and screaming their heads off. The action is cramped into all kinds of corridors, stairwells, and rooms, preferably with the lights turned off, so it's even hard to tell the various persons from each other. Which in fact isn't really a problem, because they are all nondescript and extremely unsympathetic; only main character Carlos, who's supposed to be some sort of soap superstar that teen girls rave about, gets a tiny bit of background, just to proof that he's undoubtedly the worst of the lot.
Yes, there is a meagre story: the girls are all swoon over Carlos but found out that he's untrue and philandering, and want to teach him a lesson by construeing a weird prank, that goes totally awry, with the afore mentioned consequence of everybody going on everybody's throat. Probably there's meant to be a moral too: something with the dangers of stardom and the blind worshipping by fans, but it goes all down the same chaotic and pretentious drain. And for a supposed horror there's hardly any suspense or serious scares, while the killings are simple and uninspired. I would say: don't bother with this totally superfluous failure.