North Korea is the only place in the twenty-first century where there is no freedom of movement. However, there are people who have crossed the border into the South, as in this book in which North Korean defectors serve as the subject. The protagonist, Juyeong, goes for a job interview at a publishing company with nothing posted on the walls. There she meets National Intelligence Agent Ko, who instructs Juyeong to monitor omments on the internet. After the presidential election, Ko offers Juyeong contract work at UNIWON, a resettlement education organization that helps North Korean defectors. There, Juyeong meets North Korean children who have defected to the South for various reasons.