The next few decades, speedy deterioration of the Earth's environment will leading to the spread of various diseases amoung the world. Like the medieval plague period which significantly increased the probability of infectious diseases and cancer.

    Simultaneously the cure rate of traditional treatment has dropped to the lowest point over the years.

    Facing the severe situation of environmental degradation, large pharmaceutical companies start to invest a lot of manpower and resources to study on the advanced treatment of Nano Core Robot (NCR) and retrive huge breakthrough. Since then, human war against the virus and disease coming to a new turning point. NCR seems to be the dawn of mankind in this war period. But, the problem is not as simple as it seems. Quietly,the serious problem is spreading behind the war.

    In this game, game players play the Nano Core Robot (NCR) operator in a subsidiary company of a large pharmaceutical company, Green. You will put into the war as a NCR operator, and find out the truth of the whole story.