Here is the opening paragraph from Wikipedia about this brave woman, Park Yeon-mi.
Park Yeon-mi (or Yeonmi Park; born 4 October 1993) is a North Korean defector and human rights activist who escaped to China in 2007 and settled in South Korea in 2009. She came from an educated, politically connected family that turned to black market trading during North Korea’s economic collapse in the 1990s. After her father was sent to a labor camp for smuggling, her family faced starvation. They fled to China, where Park and her mother fell into the hands of human traffickers before escaping to Mongolia. She is now an advocate for victims of human trafficking in China and works to promote human rights in North Korea and around the globe.
The following is a short video in which she tells about the nightmare people suffer in her native land. No further narrative needed. She tells the story we need to know. Very heart breaking and compelling: