What terrible events destroyed his family and left New York a crumbling, post-apocalyptic nightmare? All will be revealed in this climactic Turtle tale that sees longtime friends becoming enemies and new allies emerging in the most unexpected places. Can the surviving Turtle triumph?

More than a decade after the Last Ronin defeated the Foot Clan, New York City finds itself in a state of steady decline. Now, the disparate gangs vie for economic and political control, and the ensuing chaos is taking its toll. It's clear to Casey Marie that if something isn't done soon, the city she knows and loves will be lost forever. So, whether they're ready or not, she and her young pupils must raise a new coalition and lead the charge to keep...