After a powerful earthquake, Seoul is devastated, leaving only the ruins of the great city. Hwanggoong Apartment is the only place that is still standing after the tragedy, turning into a shelter for survivors. Young-Tak (Lee Byung-Hun) temporarily guides the residents of Hwanggoong's apartment. As the crisis unfolds, Young-Tak tries to protect residents from strangers who are slowly arriving. Min-Sung (Park Seo-Joon), who was a civil servant, is chosen by Young-Tak and becomes his assistant and meanwhile Myeong-Hwa (Park Bo-Young), Min-Sung's wife, a nurse, helps take care of her. of the injured. As time passes, the number of people in the building only increases, requiring special measures.
