Kim In-Hae frantically work together in a race against time to find a cure. An after credits clip shows life at Budang returning to normal, with the people having been completely cured and services restored. When Mi-reu sees her mother, she instinctively runs towards her. Ji-goo goes searching for Mi-reu after stabilizing Kyung-ub, but is unable to find her before she is pushed to the front of the crowd. As the meeting temporarily convened for a lunch break, In-hae informed the head-doctor of the presence of a survivor from the container. This however, has the effect of isolating the people in the camps from the rest of their country, resulting in unease in the camp populace.
Story: It's a disaster movie, not original. This set of incidents begins causing tension between the residents of the camp and their guards. Firefighter Kang Ji-Koo and Dr. Soon, thousands of people become infected every hour by the deadly virus, which kills within 36 hours of infection. In-hae urges Mi-reu to hide her illness and avoid coughing. When Monssai begins coughing, Mi-reu goes to find help for Monssai, by calling Ji-goo.
During the exchange Mi-reu demands Ji-goo's business card, so they could contact him if he had stolen anything, much to Ji-goo's amusement. After a lengthy brawl, he manages to kill Gook-hwan by impaling him on a tank trap. The outbreak becomes even more personal once she suspects her own daughter Park Min-Ha is infected by the virus. It is revealed that Gook-hwan is collaborating with the soldier from before, bribing his way into the safe-zone. I was so glad I got to. Unfortunately, this is the same supermarket that Mi-reu wandered into, and she is surrounded by people fighting and grabbing everything they can carry. Firefighter Kang Ji-Koo and Dr.
The virus is seen spreading rapidly throughout the city, with many of its citizens showing pronounced symptoms and exacerbating the spread of the flu. Public transportation is also shut down. He later admits to his co-worker Bae Kyung-ub that he found In-hae attractive. In-hae tried to pass the coughing off as a previous flu infection, but the officials are unconvinced and force her to remain in Budang. . In-hae manages to get the survivor to herself, then begins a blood transfusion between her daughter, and Monssai when the latter agrees to it after recognizing Mi-reu. In-hae and Ji-goo run towards Mi-reu, attempting to prevent her from crossing the line.
Meanwhile, in the camp, the uninfected citizens of Bundang are getting extremely agitated as they have been held for nearly a week inside the camp, despite being told they would be released in two days. She instructs Ji-goo to head towards the highway exit to Budang. Due to the evidence presented in front of them, Budang's administration agrees to locking down the city. It is revealed that Ji-goo married In-hae, and Mi-reu is back with her family. They arrange a meeting spot so that Ji-goo can give the bag to In-hae's daughter, Mi-reu.
The soldier fires, but hits In-hae in the shoulder instead, having closed his eyes at the prospect of shooting a child. He is then told by the station chief that In-hae has called him. Gook-hwan also realizes that Mi-reu is carrying antibodies for the disease, but Ji-goo manages to escape with her after a confrontation with Gook-hwan. On the way to deliver the man to their boss, the brothers stopped at a rest stop near Budang, with Byung-woo beginning to show signs of illness. Firefighter Kang Ji-Koo Jang Hyuk is one of those quarantined. He also spreads rumors that the infected are shot and killed rather than treated, causing even more tension and panic within the camp.
However, a commotion is heard outside, and the members of the meeting rush to the meeting, just in time to witness carnage unfold below on the streets. Fights break out in the camp, which escalates to a near riot. After Ji-goo attempted to comfort her, she stormed off. At the Contagion Center in Budang, In-hae is reprimanded for losing the data, but is covered by her co-worker, who claimed to their superior that others had not finished their work. Moved by the sight, the soldiers do not fire at her. He plunges into the gravesite itself, looking for Mi-reu, he is able to find her, still barely alive, when he hears her phone playing the theme song from a cartoon she watched with Ji-goo.
The Budang administration and most of the research staff at the hospital evacuate to Seoul, where the Prime Minister and President are briefed on the situation in Budang. I was blown away with this movie. Mi-reu is distraught at her mother's wounds, and shields her mother from the soldiers, pleading with them not to shoot her mother. Back at the camp, Gook-hwan bribes the camp commander to transport him into a safe-zone. As he's receiving his medication, Byung-woo begins coughing more frequently, infecting several people including the clinic doctor, a small child and a high-school student.