Explanation, Please...

Well, it's about a secret agent who's come back home during a time of heightened international tension, to discover that his wife has been having an affair. Then after some lovely rows in which furniture is thrown, she runs off and her exact duplicate turns up as a babysitter. Meanwhile, the husband has tracked down his wife's lover, an insane German weirdo with a thing for medallions and karate, and presumably hypnotism given that his smug face is way too ugly to convincingly pull Isabelle Adjani.

After a weird conversation it turns out that neither man knows where Izzy has gone, so the freaky German guy hires a private detective to find her. Meanwhile, Izzy has set up in a dingy flat where she kills people, chops them up and puts them in the fridge, inbetween having sex with a tentacled monster that frankly looks like somebody has sneezed on her bed during a nosebleed. The private detective turns up and she stabs him to death before putting him in the fridge. Then Freaky German lover boy appears and gets stabbed, much to his surprise. He goes to Sam Neill for help and says "Sam Neill, help, she craizy!" Sam Neill helps by smashing him over the head and drowning him in a blocked toilet.

Then Sam Neil finds his wife, and she explains that she had a freaky miscarriage in a subway where she basically went completely mad and threw her shopping everywhere, before having some weird episode staring at an effigy of Christ. They get it on. Then, later, Sam Neill catches Izzy in flagrante with the now much bigger tentacle-monster, which is wildly pleasuring her naked screaming form.

Then Sam Neill goes for a motorbike ride and is shot at by some coppers. He staggers up an iron staircase when Izzy appears, looking luminous and accompanied by his perfect duplicate - the monster in its final form. It seems to be a bit Antichristy. Then they all get machine gunned by the coppers and only Mr Antichrist gets away.

Back at home, Sam and Izzy's son is scared by a strange figure arriving at the door - Mr Antichrist, we think. As Izzy's double goes to answer the door, the kid runs up stairs and throws himself, face down, in the bath. Then there's a nuclear war.


Really, I can't think how you didn't follow all of this.

Mind you, as you said, it's also about the breakdown of a marriage. The emotions of violation, horror, and anguish all find expression here, but presented by surreal means. The first time I watched it I found it emotionally very raw - even thought the story is seemingly fantastical gibberish, it actually conjures a disturbingly accurate sense of the hysterical pitch and circular pain of a breakup. So it's kind of 'true' despite being fantastical.