Life has calmed down for microbiologist-martial artist Peter Sharpe and his girlfriend Liz. Gainful employment means cash money and a steady stream from their unhinged dealer, Allison. Walter has gotten his black belt and seeks full time work doing... anything, really. But the disease that almost killed them in the infected New Jersey waterpark isn't far away. It will take every scrap of fighting strength Pete and his friends possess to escape the next outbreak.