One day, Ayumi hears a rumor from her colleague Kotomi, "In an abandoned hospital ward nearby, it seems that nurses are being tested for new drugs." That night, the two of them break into an abandoned hospital ward to confirm the truth of the rumors. However, there, the two of them get to know the face behind the hospital. The existence of Kuroki, a female doctor who imprisoned her nurse and used it as a tool for human experiments in order to create humankind's
