What could possibly go wrong? For one brief moment, it seems Lilly and her plague-weary band of survivors might just engineer a better tomorrow. Banding together with other small town settlements, they begin a massive project to refurbish the railroad between Woodbury and Atlanta. The safer travel will begin a new post-apocalyptic era of trade, progress, and democracy. Out of nowhere, a brutal new faction has attacked Woodbury while Lilly and the others have been off repairing the railroad. Now the barricades are burning. Adults have been murdered, children kidnapped. But why? Why subject innocent survivors to such a random, unprovoked assault?