Teenage Mutant Ninja Turtles (2011), Volume 4

The forces of good and evil marshal on multiple fronts in "Sins of the Fathers." The Turtles have a new mission, but Shredder's ambitions could put an end to it before they begin. Plus, Krang unveils his master plan! How far will the Turtles go to defend themselves? Collects issues #13-16.