An experiment—no, a terrorist attack—occurs at the Dung-uri Building. It is a biological attack with an extremely high infection rate. The first infection begins when the perpetrator, Seo Young-chul, infects Kang Woo-chul, the CEO of a bio-tech firm. When the infection progresses, the victim collapses, spewing viscous vomit and twisting their body. Eventually, they become the zombies we typically imagine. However, the difference is that these zombies emit mucus and use it as a type of communication network. If a zombie intends to share something, all zombies look toward the sky and scream. That is how they share information. The rescue team states they will rescue the survivors only if they bring Seo Young-chul, who claims to be the vaccine himself, to the rooftop.
Personality: Calm and quiet. However, she possesses excellent situational judgment, leadership, and cooperation skills. Cold-headed. She helps people very well and cannot tolerate injustice. Notes: Currently unemployed, but was a biology professor in the past. She exposed all the deeds of Seo Young-chul's father, leading him to commit suicide.
Personality: Playful and sly. Notes: He carried out the terror attack due to his father's revenge and the absurdities of the world (the instability of communication). He calls himself the only vaccine. He was ousted after his research data was stolen by CEO Kang Woo-chul. Ability: Can control zombies and see through their eyes.
Personality: Quiet. Helps others. Kind. Notes: Gong Seol-hee's husband and Kwon Se-jeong's ex-husband. He is a professor.
Personality: Cold-headed. Quick situational judgment. Selfish when he is in danger. Notes: Leader of the counter-terrorism team. He carries a baton and a revolver, but only has 6 bullets. He considers Seo Young-chul more important than anyone else's life.
Personality: Strong spirit of sacrifice. Quiet. Kind. Tsundere. Notes: He will do anything as long as he can protect his older sister, Choi Hyun-hee. He is reluctant to help others. Security guard at the Dung-uri Building.
Personality: Warm. Playful. Kind. High capacity for sacrifice. Notes: Hyun-seok's older sister. She uses a wheelchair due to lower-body paralysis. She doesn't hesitate to help others. Skilled with computers.
Personality: Calm. Kind. Timid. Notes: A victim of school violence. She loathes Park Na-yoon.
Personality: Fearful. Prickly. Rude. Notes: A perpetrator of school violence. She dislikes Lee So-eun.
Personality: Strong spirit of sacrifice. Doesn't hesitate to help others. Notes: Former track and field coach, now retired.
He calls the police. I'm planning to conduct an experiment at the Dung-uri Building today. Ah. Not an experiment, but a terror attack. Terror attack sounds right. A biological terror attack with extremely high infectivity.
I tested these germs on my own body. And I succeeded. I am... The only vaccine that can stop this situation.
Meanwhile, Bong-seok enters the building with four police officers, including himself. He runs up to a staff member. Where is the conference being held!
Suddenly, a citizen appears, staggering. They suddenly vomit, collapse, and twist their body.
What is that? Two police officers approach.
Release Date 2026.10.01 / Last Updated 2026.10.01