Wealthy financier Johan Wallenberger is murdered in a House of Horrors of Madrid amusement park.His daughter Catherine(Pilar Velazquez)is taunted by mysterious and highly menacing phone calls and stalked by a stranger.An investigator from insurance company named Chris(Robert Hoffman)comes to Catherine's mansion where her wealthy family lives including her often drinking mother Magda(Irina Demick)and her sexually active elder sister Barbara(Patrizia Adiutori)who will be later found naked and slashed in the park.Mediocre giallo directed by highly prolific Italian director Alfonso Brescia.The film is poorly paced and quite tedious at times.Still Spanish scenery is wonderful and there is plenty of nudity.There is an interesting back story about Nazi war criminals and pretty unexpected climax.6 razors out of 10.