A strange blackmail

The entrepreneur Müller was burgled. Annoying, but not really dramatic. After all, he has plenty of money. Unfortunately, the burglary is also the start of a very special blackmail. The blackmailer wants to humiliate Müller. Money doesn't matter to him.
A game with very unequal weapons begins and puts Müller and his wife Yvonne in situations that can't been taken in more different ways than the two of them do.
Who is Beatrice, the owner of an erotic shop? She has an unmistakable penchant for bondage games and is all too eager to make Yvonne familiar with latex and stainless-steel jewelry