In the years 2xxx, circa 2095, Earth is a cold and dying planet plagued with intoxicated and infertile soils. Following the Nuclear Wars Age that registered a boom of the most polluting industries to produce chemical weapons, barely any sunlight reaches the surface of Earth.
Their unregulated use during the Nuclear Wars have pretty much transformed Earth into a vast wasteland where breathable oxygen, edible food, acid-free water are a luxury reserved to the rich who live in pollution free citadels whereas everyone else struggles to earn their right to survive the nuclear winter.
At this point, one company, Seven Skies Ltd, dominates the food chain. To secure her earnings, Seven Skies Ltd's CEO Arachne is wanting more. Her overwhelming victory is almost certain, well until a challenger gets in the way of her grander schemes, Phantom Bullet. Those guys are what she hates the most, troublesome troublemakers who have their goals set on disrupting her world domination agenda.
Season 4 of The Virus Within
Trinity is familiar with zombies, being one herself, but when strange zombies start appearing, she realizes that the world she knew might be changing yet again.
When a dangerous set of scientific notes are discovered, Trinity and her friends don't realize anything is wrong until a frantic radio call comes in. Unaware of the notes, they race to the south and struggle to determine where the strange zombies came from. The zombies are unlike any ranks previously seen, and they aren't as predictable. Some have new tricks hidden up sleeves, forcing any Stronghold they encounter to quickly adapt to the new challenge or risk being overrun. Secrets never remain hidden, and zombie apocalypses never make life easy.