From the 21st century, a subculture of humans have emerged who have been modified by way of a vampire-like disease, giving them enhanced speed, incredible stamina and acute intelligence. Since they're set apart from"normal" and"healthy" humans, the world is pushed to the brink of civil war directed at the destruction of the"diseased" population. In the middle of the crossed-fire is - an infected woman - Ultraviolet, who finds himself protecting.