The film takes place in an under-staffed hospital that is
quickly losing money. In the middle of the night, an ambulance
comes to the hospital with a patient with a strange black rash. Dr.
Akiba refuses to admit the patient, due to the fact that the
hospital is low on resources and staff. While arguing with the
paramedic, Akiba is alerted to a serious crisis in the hospital's
room 3. A patient, though unconscious, has somehow fallen to the
floor and his vital signs are dropping quickly. They think they
have saved him when they realize that the nurse has apparently
misheard "chlorate" instead of "chloride" and injects the wrong
drug into his IV. The present staff members, Doctors Akiba, Uozumi
and four nurses, after a long and harsh argument, decide to cover
up the true cause of his death and say that he died
naturally.
Soonafter, Dr. Akiba discovers that the patient he rejected earlier
has been left in the ER. The patient is apparently carrying some
sort of extremely dangerous pathogen. Another doctor, Akai, makes
his presence known and suggests that they study the symptoms of
this patient. Not knowing how much Akai knows about the events in
room 3, the other doctors reluctantly agree, only to find that the
disease carried by the unknown patient is incredibly contagious and
lethal, killing very quickly. Akai's suggested threat to uncover
the other staff members' malpractice forces them to stay in the
infected hospital until the bizarre true nature of the disease is
revealed to Akiba
