I know that I should not have found anything good in this film. I know that it is just shy of an X-rating (at the time of its release.) I know the script was atrocious and the acting pretty darn bad. I know that its surprises were observed a mile away coming. But... I confess. I liked it.

A young, expecting couple depart for a weekend getaway when they are lured to a country villa by another couple under the guise that the male of the latter recognizes the younger man as an old college acquaintance. After some Ouija board dabbling gone awry, the young couple find themselves stranded by a storm and reluctantly agree to spend the night with their hosts. An orgy, dead dog, murder, suicide, and a couple of "return from the deads" later, our two protagonists successfully flee their captors only to find the nightmare may not be over after all.

"Escalofrío" aka "Satan's Blood" has some extremely erotic scenes, primarily so because of the lovely Mariana Karr who plays the young, mother-to-be wife. There are also a few disturbing scenes involving cannibalism and sexual sacrifice, not to mention poor Blackey's fate.

If you're a fan of Spanish horror, especially the 60-70's vintage, you will probably enjoy this film because it is the epitome of its ilk. If you're looking for the next "Silence of the Lambs," look elsewhere.

It can be awkward when we are approached by a couple who swear they know us and we haven't a clue who they are. It must be a good deal worse if we accompany these people to their home to 'catch up' and we realise they are a couple of perverted demon worshippers who have some very grisly plans. This is exactly what happens to Andres (José María Guillén) and his pregnant wife Ana (Marianna Karr). Pretty soon their lives have taken on an extraordinary turn for the worse.

Directors Carlos Puerto and (an uncredited) Juan Piquer Simón make sure we're just as unnerved and anxious as the unfortunate pair. True to its 'euro-sleaze' trappings, the foreboding atmosphere is heavily punctuated with lingering scenes of sex that drag things down a little - but developments come thick and fairly fast. It's a tension-filled rollercoaster and a good way to spend 82 minutes.

With Franco dead the Spanish could let rip and this one certainly goes at a pace. There are many sex and Satanism films that barely get round to either sex or Satanism, this one revels in it throughout. Just when it gets a bit silly towards the end, it gets very silly and builds to a great finale. In fact much of the film is really good, as well as almost constant bare flesh from the ladies and the gents there is blood and gore AND a really creepy atmosphere aided by the strange antics of the main protagonists. Whenever we see them in the deserted kitchen they seem bent over some dog bowl, and when they are in bed together they growl and pair like two animals. Granted an 'S' for sex certificate upon it's Spanish release and it certainly deserves it, though it also deserves a 'V' for violence and 'G' for gore. Excellent stuff - and not over long!