The individuals that comprise the Tokyo MER team rush to on-site disasters and accidents, performing life-saving treatment thanks to the OR equipped within their vehicle. Their one mission is simple: leave no one dead. But conflicts arise when an unprecedented event rocks Yokohama after a bomb explodes in Landmark Tower, leaving thousands fighting to escape. Although the chief doctor Kitami believes they should not wait and presses for a quick dispatch, the more level-headed Chief Kamoi of the elite Yokohama MER thinks otherwise — they need to wait until the area is safe to enter, or they won’t be able to save anyone.