In the beginning of the book, Leo is a strong, effective state agent.
Then things happened that begin to shake his faith of the state, or the state methodology. He was an agent of the state that caught citizens who were accused of subversion. Yet, these people who are caught are not bad people, they are just normal people who would confess to anything if they were being tortured.
Then he found out that he has been living in a lie.
Not only he fantasied about his job, he has romanticised about courtship with his wife.
It is all a lie. And Leo begin to see the truth. The truth that put his life in danger.
It started with a denial of a child found killed near the railroad track. Leo delivered the state position that it was an accident.
Leo was also smart and he found out more information that it was no accident. That is against the state position, and all the excuse needed to get him into trouble.
He was also lied to by his wife.
A lot of lies.
Leo was happy when he didn't know the truth.
This is a Russia, Soviet era Matrix story. Would he rather take the red pill or the blue pill.
He take the red pill and now the illusion is off and the harsher reality review itself.
Almost to the end of the book. Good story telling. The movie didn't do it justice as a lot of subplot, the more internal revealing of the truth is not shown.