General Practitioner Yakumo Hibiki found himself assigned to the DMAT: Disaster Medical Assistance Team, a special unit of the exceptional methods rescuers. Called only on accidents under extreme conditions, its members must react quickly and must know always keep their composure. Immersed in this new life that he never imagined, Hibiki will face this harsh new reality, its doubts and its fears. One hesitation would cost the death for the victims present at the scene of accidents.