We could not actually understand any of the dialogue, but still watched it in rapt attention. It is about five athletes who attempt to qualify the Korean team for Olympic ski jumping.
One is doing it to win an apartment for his biological mother who gave him up for adoption as a child. Another is doing it to support his new baby. A third is doing it to get out of mandatory military service, so that he can stay home to take care of his grandmother and autistic brother. The fourth is doing it to win the heart of a girl.2.
There is no tradition of tipping in Korea, for cabs, waiters, or service people. Yet the service was far superior to what I experience in the US. We took cabs three times, and twice, the cab driver got out of his car at the end and walked several minutes with us to find our destination. The third time, the cab driver pointed and made sure that we knew where we were going.
Similarly, waitresses were attentive, and came over to refill our kimchi continually. There is no tip, but they wanted to do it, because they actually care about doing a good job.