Rough translation would be like this, and the film '7번방의 선물' is really good, you should see it if you have a chance.
Sometimes later, the writer 김황성 gave himself up to the police with his father and he was sent to the 7th cell in the prison. So some parts of the film '7번방의 선물' would be the real story of the writer according to his experience in the prison. Then the idea of 'staying in a prison would be frightening and scary' is just a 'prejudice?' As you can see in the film, even among the relations between the prisoners and the guards, something in common happens we can expect in everyday life. Wouldn't the prison be another society in our society as his scenario tells us? Of course you should not experience what it is like staying in there.