"Jirisan" episode 13 featured shocking incidents, causing Ju Ji Hoon, Jun Ji Hyun, Oh Sung Se and more to feel devastated by the unfortunate tragedy.
As the tvN mystery thriller series neared its finale, the latest episode's viewership rating scored an average nationwide rating of 7.7 percent, per Nielsen Korea.
"Jirisan" episode 13 viewership rating remains unbeatable, being the top place in its time slot across all cable channels.
''Jirisan'' Episode 13 Highlights: Lee Yang Sun Falls into an Accident + Seo Yi Kang Received a Tragic News
The December 4 episode continues with the rescue mission of the park rangers during the strong rainfall that occurred in the mountain.
The Haedong rangers were proud and expressed their support for Lee Yang Sun, who had just carried out her first-ever mission.
Over the radio, Jung Goo Young cheered Yang Sun and was so proud that she managed to lead the rescue.
READ MORE: 'Jirisan' Episode 12: Jun Ji Hyun Opens her Painful Past to Ju Ji Hoon + Viewership Rating Show Slight Increase
However, the group heard a loud scream saying that the female park ranger had fallen into the river.
Goo Young immediately traversed the mountain as he attempted to save Yang Sun.
Park ranger commander Jo Dae Jin also instructed the team for a rescue operation.
Unfortunately, due to the strong current and rainfall, the group needs to abort the mission leaving Goo Young in deep agony.
Seo Yi Kang also received shocking news about her grandmother at the height of the tragedy.
Commander Jo Dae Jin informed the ranger that Lee Moon Ok was among the victims of the bus accident.
Seo Yi Kang Blames Kang Hyun Jo for her Grandmother's Death
After a series of investigations and searches, the officials wrapped up the rescue mission.
As for Seo Yi Kang, it was still hard for him to accept losing the only family she had.
She recalled the good and the bad times with Lee Moon Ok and regrets being a stubborn granddaughter.
The grieving ranger also rejected the help from his colleagues for the burial ceremony of her grandmother--this includes Kang Hyun Jo, who expressed his sympathy but Seo Yi Kang blamed the rookie ranger for the death of her family.
If it weren't for the bus, grandmother would still be alive," he said, pointing out that if Hyun Jo did not insist her grandmother ride the bus, she would have been alive.
Kang Hyun Jo Connects the Cable Car Project and the 1995 Accident
"Jirisan" episode 13 also featured how Kang Hyun Jo is eager to crack the mysterious care at the mountain and avoid more deaths.
He feels guilty about the loss of Lee Moon Ok and continues his hush-hush investigation with the case.
The rookie ranger asked their commander more about the cable car project and the 1995 accident.
He connected the dots and thinks that the two are involved with the current Jirisan accidents.
Kang Hyun Jo's Vision
The latter part of "Jirisan" episode 13 showed the present time in 2020.
It was during Seo Yi Kang and the ranger team leader Park Il Hae'sHae's confrontation with Jung Goo Young.
The duo thinks that Goo Young might be connected with the Jirisan incidents since he was at the mountain during Lee Da Won'sWon's death; however, they found out that he was visiting the mountain because of Yang Sun.
"You told me to remember things," he said to Il Hae, adding that he will never ever forget her.
However, the trio received an SOS call regarding an accident nearby.
Goo Young, alongside Il Hae, rushed for the rescue leaving Seo Yi Kang in the middle of the woods.
Jirisan" episode 13 also showed that Kang Hyun Jo, who was at the hospital, finally woke up.
His spirit tries to save Seo Yi Kang from possible danger at the mountain.
