Tom Bauer

17 years after the events of first movie, Choi Sung-hoon, Lee Han Dong's son, who grew up in abusive family, and has fallen to life of petty crime, ends up in jail, same one where Lee Jeong-suk is serving his sentence. Choi Sung-hoon's mother there visits Lee Jeong-suk and begs him to take her son under his protection. Being Lee Han Dong's childhood friend he agrees, and Choi Sung-hoon who never had any sort of proper role model in his life, is quickly swayed by this senior. But what will happen when Choi Sung-hoon learns why is Lee Jeong-suk sentenced in the first place?

The worst epidemic ever seen is sweeping through Bundang, the suburb of Seoul. After smuggling illegal immigrants into the country, Byung-woo dies from an unknown virus. Soon after that, the same symptoms are plaguing scores of residents in Bundang. People are helpless against the airborne disease and the number of infected increases quickly, spreading chaos. As the worst-case scenario precaution, the city of half a million people, just 19 kilometers from Seoul, is about to be sealed off. The government orders a complete shutdown. Meanwhile, infectious disease specialist In-hye and rescue worker Ji-goo go into the closed city to find the blood serum of the index case, a crucial part of developing the vaccine.