It's about the story. From their piece:
Our motivations for covering this story were many. First and foremost, we believe that journalists have a responsibility to shine light in dark places, to give voice to those who are too often silenced and ignored. One of us, Euna, is a devout Christian whose faith infused her interest in the story. The other, Laura, has reported on the exploitation of women around the world for years. We wanted to raise awareness about the harsh reality facing these North Korean defectors who, because of their illegal status in China, live in terror of being sent back to their homeland.