Part four of dekalog is about the strange nature of a secretive relationship, Between a father and his daughter.
Part four circles around the illustration of the core desire in women and a forbidden love they sometimes bear with themselves without any actual fulfillment; and a man who builds up a symbol as a father.
During the episode 4 we don't feel god but somehow the ethical part of the fourth commandment is controlling the nature of their relationship.
The pain of this forbidden love is on the shoulders of both woman and man, how they feel about each other in different situations and how they escape from it.
The story itself has been made around a secret which is kept in an envelope, a secret to be opened one day.
But some secret are better to stay unknown.
The character of father in this episode had been built so correct and mysterious which makes the audience wonder about his belief if he has one.