When two police detectives get involved in their operation, the nurses of Mochizuki Hospital must wield their instruments - katana, machine gun, and pistol - with even greater precision to excise the cancerous Masaki from the city. As each nurse uses her particular expertise to dispatch Masaki's thugs, Arashi pursues Masaki to the roof. Arashi struggles with his piecemeal identity, but treating this human virus is something both sides of him are sure of . . .