Ellie Linton, a teen from an Australian coastal town, leads her friends on an excursion to a camp deep in the woods, dubbed “Hell.” Upon their return, the youths find that their town has been overrun by an enemy army, and their friends and family have been imprisoned. When the hostile invaders become alerted to their presence, Ellie and her friends band together to escape — and strike back against — this mysterious enemy.

In the late 21st century, a subculture of humans have emerged who have been modified genetically by a vampire-like disease, giving them enhanced speed, incredible stamina and acute intelligence. As they are set apart from “normal” and “healthy” humans, the world is pushed to the brink of worldwide civil war aimed at the destruction of the “diseased” population. In the middle of this crossed-fire is – an infected woman – Ultraviolet, who finds herself protecting a nine-year-old boy who has been marked for death by the human government as he is believed to be a threat to humans.