Lee Hae Sung is a surgeon who leads the Disaster Medical Assistance Team (DMAT) and puts the needs of the injured citizens above any concerns about money. But his altruistic approach puts him at odds with the cold, calculating surgeon Han Woo Jin. Jung Ddol Mi is an orthopedic resident who is thrust into the chaos just as she first arrives in the city, while An Dae Gil is a caring young doctor who is the youngest member of the DMAT. However, a disaster strikes Seoul. It paralyzed the city and the drama will unfold around rescue workers and emergency doctors who jump in to help.