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.

𝐘/𝐧 𝐋/𝐧, 𝐭𝐡𝐞 𝐟𝐚𝐦𝐨𝐮𝐬 𝐬𝐢𝐧𝐠𝐞𝐫 𝐚𝐧𝐝 𝐯𝐞𝐫𝐲 𝐭𝐚𝐥𝐞𝐧𝐭𝐞𝐝 𝐰𝐨𝐦𝐞𝐧 𝐲𝐨𝐮'𝐯𝐞 𝐞𝐯𝐞𝐫 𝐬𝐞𝐞𝐧 𝐛𝐮𝐭 𝐰𝐡𝐚𝐭 𝐰𝐢𝐥𝐥 𝐡𝐚𝐩𝐩𝐞𝐧 𝐰𝐡𝐞𝐧 𝐬𝐡𝐞 𝐬𝐚𝐰 𝐭𝐡𝐞 𝐛𝐨𝐨𝐤 𝐨𝐟 𝐡𝐞𝐥𝐥