On September 14, iQiyi Korea released the first trailer for 'Jirisan', starring Jun Ji Hyun and Joo Ji Hoon.

The upcoming tvN drama 'Jirisan' is a collaboration project between 'Kingdom' series writer Kim Eun Hee and 'Mr. Sunshine' director Lee Eung Bok. The drama will depict the story of Seo Yi Gang (played by Jun Ji Hyun), the best ranger at Jiri Mountain National Park, and Kang Hyun Jo (played by Joo Ji Hoon), a rookie ranger with a dark secret. The drama will follow them as they work to save people inside the Jiri Mountain National Park.

The first trailer video for 'Jirisan' was released on iQiyi Korea's official YouTube channel, gathering excitement for the drama's upcoming premiere. The intense thunder and lightning, introduced with heavy rainfalls and landslides, immediately created a tense atmosphere. Professional mountain ranger Seo Yi Gang then made an appearance amidst the heavy weather, suggesting to viewers the unsual events that will likely occur inside of Jiri Mountain National Park. Further, Seo Yi Gang's new partner ranger Kang Hyun Jo shows up in a sharp look, shining a lantern toward an area as if he found something in the mountains. The released trailer video heightened viewers' curiosity and their excitement for the release of 'Jirisan'.

Meanwhile, 'Jirisan' will premiere on October 23.