Torin is just a 17-year-old girl living with her brother, Atlas, and sister, Taeh, somewhere deep in the crevices of New York. Together they've created a covert business using Atlas's skill for invention and technology. After a woman called Locke breaks into their home and steals a mysterious project that Atlas had been keeping secret, life begins to change for the three of them as they attempt to track her down and get it back. In this new, dangerous mission, they learn more about the project, the people behind all this... and their own brother.
"'This is brand new technology. Nothing of this sort has ever been made before, at least not successfully. If worn by the right person, or, in this case, the very wrong one...' Atlas pauses. I can almost see him thinking about Locke. 'You are invincible.'"
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.