Newly weds Nam Gun Woo and Baek Mei Zhen are living together in a modest apartment on Gun Woo's salary as a news cameraman. One day when they were driving in the rain the couple encountered a beggar. While trying to help the beggar an "incident" occurred. Shortly after, news of the "infected" began to spread. Of patients that escaped the hospital. The situation quickly spiraled out of control. A story of love and survival.