A carbon dioxing poisoning incident occurs at a foreign embassy. The MER team is dispatched but are unable to enter without permission due to legalities. On the other hand, Governor Akatsuka collapses due to a chronic illness. Kitami and rescue commander Senju head to the rescue in an underground parking lot and get locked up. As time goes by, oxygen diminishes and the patients condition deteriorates. In desperation, they take a dangerous bet to save lives.
TOKYO MER is formed by order from the Governor of Tokyo. The name of the group stands for TOKYO Mobile Emergency Room. The members are emergency care professionals and they are to go to sites of dangerous accidents and disasters by ER car. Their ER car is a large vehicle equipped with the latest medical devices and an operating area. There, TOKYO MER saves lives of the injured.
Kōta Kitami is a doctor for TOKYO MER and its leader. He holds a strong conviction that, regardless of the dangers, he will go to accident sites to save lives.
