An unprecedented 6.5-magnitude earthquake has struck Seoul, destroying roads and buildings, and preventing ambulances from reaching victims. Woefully unprepared for such a massive disaster, Korea can only watch the desperate situation and listen to the pleading cries for help. Hae Sung, a competent surgeon, can’t resist doing everything he can to help the injured people during the emergency. This upsets his hospital and they put him on a blacklist, as his benevolent help is against the hospital's profit. Ddol Mi, beautiful and ambitious, chased money and fame as a doctor, but now wants to become a truly compassionate doctor after meeting Hae Sung. Woo Jin has been building a successful career as Korea’s rising doctor, but secretly, he truly cares about being a genuine doctor, saving the lives of the sick. These three characters team up to rush into emergencies, holding onto hope in the most desperate situations, and taking all sorts of risks for the sake of saving lives. (Source: JTBC)