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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

Mun-yeong decides she’s going to publish the new fairy tale after all. Everyone comes together at the hospital for a reading of the book.

The VIP patient’s incident triggers childhood memories for Gang-tae, who remains an emotional puzzle to Mun-yeong. Lee Sang-in arrives in town.

With nowhere else to take Mun-yeong, Gang-tae brings her back to his place. Discovering her there surprises everyone, most of all Nam Ju-ri.

When Mun-yeong offers an opportunity to Sang-tae, Gang-tae is forced to bend to their will. A patient at the hospital rattles Mun-yeong.

Gang-tae takes a day off from work to spend time with Mun-yeong, who seems to need a distraction. While drinking alone, Ju-ri encounters Sang-in.

Mun-yeong decides she’s going to publish the new fairy tale after all. Everyone comes together at the hospital for a reading of the book.

Mun-yeong decides she’s going to publish the new fairy tale after all. Everyone comes together at the hospital for a reading of the book.

With nowhere else to take Mun-yeong, Gang-tae brings her back to his place. Discovering her there surprises everyone, most of all Nam Ju-ri.

With nowhere else to take Mun-yeong, Gang-tae brings her back to his place. Discovering her there surprises everyone, most of all Nam Ju-ri.

When Mun-yeong offers an opportunity to Sang-tae, Gang-tae is forced to bend to their will. A patient at the hospital rattles Mun-yeong.

When Mun-yeong offers an opportunity to Sang-tae, Gang-tae is forced to bend to their will. A patient at the hospital rattles Mun-yeong.

Gang-tae takes a day off from work to spend time with Mun-yeong, who seems to need a distraction. While drinking alone, Ju-ri encounters Sang-in.

Gang-tae takes a day off from work to spend time with Mun-yeong, who seems to need a distraction. While drinking alone, Ju-ri encounters Sang-in.

The VIP patient’s incident triggers childhood memories for Gang-tae, who remains an emotional puzzle to Mun-yeong. Lee Sang-in arrives in town.

The VIP patient’s incident triggers childhood memories for Gang-tae, who remains an emotional puzzle to Mun-yeong. Lee Sang-in arrives in town.