A group of Southeast Asian stowaways came to South Korea after many hardships, but almost all the stowaways in the container died, and only one person dragged his weak body and escaped into the downtown. Little did they know that this person was carrying the deadly swine flu virus. In just one day, the virus quickly spread to every corner of the city. Many people were infected unknowingly, and then the shadow of death was brought to everyone around them. The beautiful female doctor Jin Renhai (played by Xiu Ai) is a single mother. She suffered a car accident not long ago and was fortunately rescued by the fire brigade rescuer Jiang Zhijiu (played by Zhang He), but she was criticized by her superiors for losing important thesis materials. During this period, the younger brother of the Korean snakehead was sent to Renhai’s hospital for treatment due to influenza. After diagnosis, the cause of the influenza was finally discovered. The container with dead bodies lying around was undoubtedly the key to finding the source of the disease. Before long, the swine flu virus broke out and spread geometrically, and the people who enjoyed peace faced an unprecedented disaster...