An incident occurs in which a thug holds a seriously ill girl hostage. A bullet flies into the downtown area. Tokyo MER's Kitami Kota rushes to the scene, claiming that without medicine, the girl's life is at stake. He confronts the police who only care about honor. To save the life of a girl whose seizures put her life at stake, Nurse Kuramae Natsume volunteers to replace her. Natsume, a single mother with a daughter, has a strong desire to save the girl. However, in the meantime, the criminal shoots at Natsume...

Kota, who lost his beloved sister, announces his withdrawal from MER. The governor, Akatsuka, wallows in a comatose state. Otowa decides to dissolve MER. Meanwhile, a series of terrorist bombings done by Tsubaki Elliot burn all over Tokyo. Many are injured, but no one calls to dispatch MER and the ER car is prohibited. The members are in a pinch but, at that time...

The story of the last dispatch of MER.