Seo Yi-Gang is the best ranger at Jiri Mountain National Park. She knows virtually everything about the area, including where to climb the mountain. Kang Hyun-Jo is a rookie ranger at Jiri Mountain National Park. He graduated from the military … Jun Ji-hyun, Ju Ji-hoon, Sung Dong-il, Oh Jung-se, Kim Young-ok, Jo Han-chul, Jun Suk-ho Added on Netflix 2023-04-23. Youtube Trailer