The movie portrays young people going to Korea to spend a few weeks to discover the culture from which their parents came from. The movie was great in chosing as much as possible actors who were of Korean origin, though born/raised outside of Korea, giving additional realism to a movie, which could have easily sunk into nonsense or as a copy of USA coming of age movies.
Some parts are phenomenal, e.g. having the real singer Kim WanSun from the 80's singing her song Tonight as a bar singer, or the incident at the DMZ.
Coming myself from the Italian diaspora, having married a Korean, and living in neither countries, this movie was special to me. 감사합니다/grazie