After the cataclysmic events of "City At War," the Turtles find New York City drastically changed—new factions and enemies are on the rise, and allies are in short supply. The Turtles discover that in order to survive they will need to work together like never before, but when they find themselves separated, Old Hob decides to fill the power vacuum with some very unusual mutants: Zanna, Mushroom, and Zink! Collects issues #101-105 of the series.