A tunnel collapse accident has occurred! Kota Kitami rushes to the scene and finds out that the doctor carrying a heart meant for a transplant is buried in the rubble. He tries to rescue him, but another collapse occurs. Still, Kitami tries to rush alongside Senju Mikio and Kuramae Natsume. On the other hand, the female patient awaiting operation by Takanawa Chiaki is approaching the time limit of her life. All member use their courage to challenge the "relay of life"!
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.
