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  • : 12
  • : 4
  • OCN
  • 22
  • Action Fantasy Mystery Science-fiction Suspense Thriller

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1
1x1
The Sinkhole
Episode overview
After losing her husband to serial killer Lee Soo Yeon, police detective Lee Hwa Sun makes her way to Muji city in order to bring the murderer in. But unlike what she is hoping to find, .. show full overview
1x2
The Breakout
Episode overview
The news of the sinkhole spreads throughout Muji and more people come to take a look. However, things go wrong as they get infected by the black smoke and start attacking each other. Not .. show full overview
1x3
The New Saviour
Episode overview
The young girl goes missing, and Hwa Sun searches everywhere for her. When she finds her, she realizes she is within a religious cult that won't let go. Meanwhile, Tae Han makes his way .. show full overview
1x4
Inside the Black Smoke
Episode overview
Hwa Sun and Do Yoon make it to the safety of Muji High School. However, they get confronted by Mr. Choi, who thinks they are a threat to everyone inside the school. At Muji Hospital, Tae .. show full overview
1x5
A Convict on the Loose
Episode overview
Tae Han and the officers continue to look for the survivors in Muji Hospital. However, they get a strange feeling something is following them. Meanwhile, at the school, Hwa Sun and a few .. show full overview
1x6
Breach at Muji High School
Episode overview
Do Yoon and the survivors at the school wait for Hwa Sun to return, but they soon find out Jin Seok had his way. Under the influence of the monster, Jin Seok takes down the barricade to .. show full overview
1x7
The Monster Inside
Episode overview
Hwa Sun and the rest escape from Muji High School, while the shaman controls the people in the hospital. As Hwa Sun makes her way to the Muji Hospital, the monster within the smoke takes .. show full overview
1x8
A Doctor Searches For A Cure
Episode overview
Hwa Sun contains the monster inside herself and tries to save Soo Yeon. However, the monster in the smoke interferes. Later, Hwa Sun envisions things happening around her. At the .. show full overview
1x9
A Change Of Heart
Episode overview
Tae Han rushes to the hospital after Hwa Sun tells him about her vision. When he gets there, he gets caught up in the chaotic ritual of the shaman and joins the officers as part of the .. show full overview
1x10
The Monsters Weakness
Episode overview
Hwa Sun confesses to the group that she inhaled black smoke. But what shocks them more is the monster she thinks is hiding inside one of them. As the people in the hospital get .. show full overview
1x11
Dong Rim’s Diary
Episode overview
The monster's weakness gets revealed. However, there's no liquid nitrogen around to test Hwa Sun's theory. Tae Han leads them to the Dermatologist department, where they think liquid .. show full overview
1x12
Muji Chemical
Episode overview
After reading the monster's message, Hwa Sun, Tae Han, and Soon Il go to Muji Chemical to rescue Do Yoon. Although they think it's a trap, they risk their lives to end it once and for .. show full overview

Characters