>Mark is a quiet impotent man who, through work, is separated for a long time from his wife.
>His wife Anna is a lonely sexually unfulfilled woman... she is a perfectionist by the way.
>When Mark returns home, Anna abandons him and begins to search for the perfect man for herself who will be able to satisfy her sexually.
>Mark slowly begins to create in his imagination the ideal of a woman who would look like his wife, but have a completely different character. This is how Helen is created - a quiet, modest teacher. Who does not demand sex from Mark.
>Anna, who has moved away from Mark, rents a flat located in a dark tenement. There she experiments with men, looking for the perfect one. However, she can never achieve complete satisfaction. Thus, in her imagination, she begins to create the ideal man from some of the men she has been involved with. This is how a monster begins to emerge - a perfect man who could finally satisfy her.
Throughout, Anna and Mark feel a kind of love for each other, but also a kind of contempt and hatred. They both can't decide which of these feelings is stronger.
>All these murders and deaths don't really happen. It's all a metaphor. Just as it is a metaphor that Heinrich did not see the monster but his reflection and that is why he was so frightened. He realised that his whole philosophy of life was a bunch of nonsense created by himself to justify satisfying his lusts. Mark, on the other hand, gradually begins to accept more and more what Anna expects of him. Mark begins to turn into Anna's dream monster (man).
>Mark's job and the people at work and those police officers can be explained as the world that indirectly caused and is causing the crisis in Mark and Anna's marriage.