Return to the Ronin-Verse! In Last Ronin: Lost Years, new secrets of the Turtles' past are revealed as we learn more about the devastating series of events leading up to the Last Ronin's final battle, as well as its aftermath. For Michelangelo in particular, the march to his heartbreaking last battle was long and dangerous, taking him from New York City, to Japan, across Asia and Europe, and then back home again to administer final justice against those guilty of killing his family. But what happened during those fateful years when he had only the need for vengeance and Master Splinter's journal to guide him? What battles did he fight? What hard lessons did he learn? The time has come to reveal what adventures the Last Ronin experienced during his vengeful journey. While in the present, a new master, Casey Marie Jones, prepares her young terrapin students to be the next generation of... Teenage Mutant Ninja Turtles! Collects the five-issue series and the TMNT: Lost Day Special.