Episode 1
Episode: 1x01 | Airdate: Jan 28, 2022 (66 min)
Inside Lee Byeong-chan's science lab, a student incurs a seemingly harmless bite. Shortly after, a fast-spreading outbreak soaks the school in blood.
Episode: 1x01 | Airdate: Jan 28, 2022 (66 min)
Inside Lee Byeong-chan's science lab, a student incurs a seemingly harmless bite. Shortly after, a fast-spreading outbreak soaks the school in blood.
Episode: 1x02 | Airdate: Jan 28, 2022 (70 min)
The infected multiply in droves. Scrambling for their lives, Nam On-jo and Lee Cheong-san find safety with others inside a classroom — but not for long.
Episode: 1x03 | Airdate: Jan 28, 2022 (62 min)
When one of the group is scratched while fighting a zombie, Lee Na-yeon demands they kick him out. Outside, the virus swallows up the city.
Episode: 1x04 | Airdate: Jan 28, 2022 (72 min)
In need of a cellphone, two students take a risky journey to the teachers' office. Byeong-chan passes on critical information to Detective Song Jae-ik.
Episode: 1x05 | Airdate: Jan 28, 2022 (56 min)
Martial law is imposed on the city. When Cheong-san is separated from the rest of the group, On-jo leads a mission to use a drone to locate him.
Episode: 1x06 | Airdate: Jan 28, 2022 (67 min)
The group clears a path to Cheong-san using sound to draw away zombies, but a new type of threat surfaces. Nam So-ju breaks out of the quarantine camp.
Episode: 1x07 | Airdate: Jan 28, 2022 (60 min)
To make it out of the music room and onto the roof, the students put into action their most perilous plan yet. Elsewhere, Jae-ik comes across a setback.
Episode: 1x08 | Airdate: Jan 28, 2022 (58 min)
Jae-ik and his crew run into a student from the school. Na-yeon works up the courage to face her peers. The group shares confessions around a fire.
Episode: 1x09 | Airdate: Jan 28, 2022 (61 min)
A disturbance at the camp shifts the military's understanding of the virus. A thunderstorm provides cover as the group agrees to keep on moving.
Episode: 1x10 | Airdate: Jan 28, 2022 (54 min)
The auditorium quickly becomes a trap for the two newly united teams of survivors. Byeong-chan's video logs reveal a drastic solution to the crisis.
Episode: 1x11 | Airdate: Jan 28, 2022 (56 min)
Though a surprise protector provides the group safe passage to their next stop, Yoon Gwi-nam is not far behind. The military makes a grave decision.
Episode: 1x12 | Airdate: Jan 28, 2022 (53 min)
The students make it to the quarantine camp, each of them weighed down by tragic loss. Months later, they hang on to hope for a survivor.