This film essentially begins with a young man by the name of "Federico" (Jean Sorel) who is married to a wealthy woman named "Monica" (Nadiuska) but is having an affair with another woman by the name of "Eva" (Barbara Rey). As it so happens, Federico works with a female colleague named "Elena" (Karin Schubert) who is romantically involved with Eva and is using her affair with Federico to gain control of his company. To make matters even more complicated, a man named "Diego" (Damien Velasco) has just been released from prison and the first thing he does is to blackmail Federico by threatening to reveal his past criminal history before he met Monica and became successful. Eventually, one thing leads to another and Monica soon discovers that she has become an innocent victim in a scheme by certain people so obsessed with money and power that they are willing to do anything to acquire it. Now rather than reveal any more I will just say that this film derives much of its entertainment value by the mystery it manages to contain until the very end. That being said, this film managed to keep my attention for the most part and for that reason I have rated it accordingly. Slightly above average.

This outrageous Spanish thriller was distributed in the US as Death Haunts Mónica--an apt enough title until one realizes how much else is haunting the poor girl. Murder, mayhem, kinky Sapphic encounters, and risqué bathing behavior are just a few of the elements in Ramon Fernandez's off-the-wall Giallo.It features no fewer than three European beauties: Nadiuska, Bárbara Rey, and Karin Schubert. All three are on full display for a significant part of the film. They are accompanied by several others who present brief glimpses.The principal male, Monica's (Nadiuska) husband, is French actor Jean Sorel. I remember him in front of a firing squad in the original Day of the Jackal. Of course, Monica may be putting him in front of a firing squad if he doesn't leave his mistress (Bárbara Rey).Elena (Karin Schubert) is plotting to steal the company, and stirring things up with Monica and her husband. But, things get twisted and you don't know who is fooling whom.

Most enjoyable, Spanish giallo type mystery thriller starring the very fine Jean Sorel, just a shame the Spanish dub removes his voice and that someone decided he should have dark hair. Maybe light hair was too effeminate on men at this time as the Spanish rushed out from under the fallen censorship of dead Franco. Certainly the ladies take every opportunity to pepper the proceedings with regular showers and changes of clothes. And despite all this I enjoyed it! Seriously, this is well worth seeking out, it runs less than 90 minutes and races along from start to finish barely allowing time for the subtitles to appear or the next character to speak. No dosing during this fascinating tale with at least two plot lines. Absolutely never a dull moment and although this is more psychological than gory, there are still plenty of killings to keep one guessing. Nadiuska is also worth a mention as the lovely and wealthy wife of Sorel who tends to glide about beautifully in the early stages and then go berserk towards the end. Really good fun.

Monica is the pill popping rich (her money) wife of a businessman being blackmailed by a former partner in crime. Said husband has also been carrying on an affair with a model. The affair puts the man's marriage in jeopardy. After a (too) long build up, the blackmailer dies and the body is disposed of, but the corpse re-appears. What is going on? You won't care! This film has a low body count and a predictable outcome. As for the sleaze factor, the nudity is not that plentiful nor, in my opinion, are the women overly attractive. Although Spanish in origin, Death Haunts Monica has the plodding quality of the worst in Italian thrillers.