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.
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.
Jin Sung-Jong takes the helm as Director. Patient Jo Su-Ji’s case takes an unexpected turn. Empty nested Yoon-Do’s home isn’t so sweet since encroachers arrived.
Old scars for Ji-Hong to do some self-reflection after he oversteps his boundaries with Hye-Jung. Do Jo In-Joo returns to Guk Il Medical Center as Staff Surgeon in the general…