Tae Han and the officers continue to look for the survivors in Muji Hospital. However, they get a strange feeling something is following them. Meanwhile, at the school, Hwa Sun and a few risk their lives to fetch medicine from the nurse's office. But one of them abandons them to save his own life, leaving Hwa Sun against the mutants all on her own. 

Hwa Sun and the rest escape from Muji High School, while the shaman controls the people in the hospital. As Hwa Sun makes her way to the Muji Hospital, the monster within the smoke takes control of people one by one, leaving only some to carry on. Meanwhile, Tae Han seeks refuge at a supermarket but runs into a nurse in distress.