Season 1

Seo Yigang is the best ranger at Jirisan National Park. She knows virtually everything about the area, including where to climb the mountain. Kang Hyeonjo is a rookie ranger at Jirisan National Park. He graduated from the military academy and was once an army captain. He has a secret that he can't tell anyone about. These two people become partners and they work to save people around Jirisan National Park.

1. 

   1. Episode 1

   2021-10-23 · 72m

   Newly recruited park ranger Kang Hyeonjo is sent to search for a teen who has gone missing in Jirisan National Park but is impeded by a typhoon.

2. 

   2. Episode 2

   2021-10-24 · 83m

   While pursuing a vision on the mountain, Hyeonjo meets a man who's searching for his father’s ashes. The two continue their risky ascent together.

3. 

   3. Episode 3

   2021-10-30 · 64m

   The rangers stop a shamanic ceremony, and a girl passes a mysterious message to Hyeonjo. The team gets a report that an elderly woman has disappeared.

4. 

   4. Episode 4

   2021-10-31 · 59m

   Seo Yigang beholds a spooky scene in a video recording. Back in 2018, the team is unfairly blamed for the death of a villager.

5. 

   5. Episode 5

   2021-11-06 · 62m

   Yigang tells Hyeonjo that she saw someone with scratch marks on their hand. He suspects it may be the bomber. The rangers look for Lee Yangseon.

6. 

   6. Episode 6

   2021-11-07 · 70m

   Snow closes the park. Yigang learns that someone with the same name as her first love is coming to collect an item. A suspicious car approaches.

7. 

   7. Episode 7

   2021-11-13 · 60m

   Yigang realizes that Hyeonjo’s soul is wandering the mountain. In 2019, Hyeonjo sees a vision of a fire. The two are in danger in different places.

8. 

   8. Episode 8

   2021-11-14 · 61m

   Following a rescue attempt, Hyeonjo finds out that someone has been trying to kill him and realizes that the recent murders weren't a coincidence.

9. 

   9. Episode 9

   2021-11-20 · 60m

   Lee Dawon is missing. The rangers go in search and find Dawon’s phone, which contains a suspicious voice recording with an unexpected person.

10. 

    10. Episode 10

    2021-11-21 · 59m

    The police find a man lying in shock in the road. Yigang and Hyeonjo get lost on their way to a village and see ominous lights in the darkness.

11. 

    11. Episode 11

    2021-11-27 · 64m

    Cho Daejin is arrested as a suspect in Dawon’s death. Yigang develops a strong hunch that one of the rangers is actually the killer.

12. 

    12. Episode 12

    2021-11-28 · 59m

    The rangers search for groups of climbers trapped in the park by heavy rainfall. Yigang meets a survivor of the 1995 flood that killed her parents.

13. 

    13. Episode 13

    2021-12-04 · 59m

    The rainfall causes fatalities. Hyeonjo discovers that the accident on the bridge was intentional and looks into the connections between the victims.

14. 

    14. Episode 14

    2021-12-05 · 59m

    At Geomeundarigol Village, Hyeonjo catches a suspicious man in black gloves. After hearing his testimony, Hyeonjo starts to suspect someone new.

15. 

    15. Episode 15

    2021-12-11 · 59m

    Hyeonjo’s family decides to switch off his life support. The rangers start looking into people connected to the village, and Yigang has a revelation.

16. 

    16. Episode 16

    2021-12-12 · 71m

    After the truth is finally revealed, Yigang grills the perpetrator. The culprit goes to conceal some evidence, but there meets Hyeonjo’s soul.