Mun Su Gyong, who was 20 at the time, had been chosen to work overseas in a North Korean state-owned restaurant in Phnom Penh, Cambodia. The parents are very happy and proud to hear that their daughter Mun was selected to work overseas. 

When Mun sent a letter to her parents, she even decorated the note with colorful embellishments.  She told them that she was planning to go home soon, the parents were excited to see their daughter again, but that was three years ago. Mun Su Gyong is nowhere to be found until today.  

Kim Sun Jong, an artist, and her husband, Mun Sung Jin, a police officer, cherished the last letter they received from Mun as it became the last tangible memory that they have of their daughter.

A week after Mun wrote the letter to her parents regarding her trip back home, she told them to organize a gathering for her because she plans attend the university. Following that time, Mun Su Gyong mysteriously disappeared.

Her North Koreans co-workers said that the regular customers who had befriended Mun Su Gyong may be the ones responsible for her abduction.

Witnesses said that they saw men forcing Mun into a car as they drove away. But the government didn't see any reason to pursue the case and called the claims to be "completely groundless."

Both of Mun's parents were happy and proud to show the pictures and their treasured moments with their lost daughter. Until now they are still holding the baby photos of their daughter and are still very hopeful that Mun will come back to them safe and sound.

Mun's father is firm with his belief that there's no way his daughter would have gone willingly. It may have already been a long time since Mun disappeard but he said that the pain never ends. "The pain has never diminished," he says. "It has only increased in the past four years."