Watch: Jun Ji Hyun, Joo Ji Hoon, Sung Dong Il, And More Have Just 30 Hours To Save A Life In "Jirisan" Preview

tvN’s upcoming drama “Jirisan” has released a preview of the first episode!

Written by Kim Eun Hee (“Signal,” “Kingdom”), “Jirisan” is a mystery drama starring Jun Ji Hyun as Seo Yi Kang, a top ranger at Mount Jiri National Park, and Joo Ji Hoon as Kang Hyun Joo, her rookie partner who is hiding an unspeakable secret. The drama follows the rangers at the national park as they uncover the truth behind a mysterious accident that occurred on the mountain.

The first episode preview starts with the rangers being deployed in the middle of a typhoon to find a lost mountain climber on Mount Jiri. Despite the pouring rain, flash floods, and fierce winds, the rangers only have 30 hours of “golden time” to locate the climber before they are considered beyond saving.

The rangers include Seo Yi Kang (Jun Ji Hyun), Kang Hyun Jo (Joo Ji Hoon), Jung Goo Young (Oh Jung Se), Lee Da Won (Go Min Si), Haedong Branch Office head Jo Dae Jin (Sung Dong Il), Bidam Shelter head Park Il Hae (Jo Han Chul), and Haedong Branch Office administrative employee Lee Yang Sun (Joo Min Kyung).

The voice-over shows that there is conflict within the rangers about what to do within these precious 30 hours. Some of the rangers are willing to risk their own lives on the chance that the climber is still alive, while others are less willing to take that bet. There are hints of a greater mystery as someone says, “I keep seeing the place where all the stranded people are,” and Jo Dae Jin asks Seo Yi Kang, “What exactly happened to you and Hyun Jo?” Lee Da Won is shocked at the sight of something, and later watches with Jung Goo Young as someone is carried out in a body bag.

Check out the first episode preview of “Jirisan” below!

“Jirisan” premieres on October 23 at 9 p.m. KST.

Edit: This version of this article has been corrected to fix a translation error.