Ahn Se-bin

Jin-man receives an unexpected call; Ji-an, who is alone at home, is pursued by unidentified men.

Ji-an, who is helplessly attacked in her own home, dodges the flying bullets.

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.

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.

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.

E2, Ryu Taesuk and the samples go missing. Seeing a familiar name on the intruder, Jian follows her down the vents for answers.