The apocalypse started in the year 2044. Ten years later, New York was a ruined wasteland ravaged by the Krang and the creatures they had infected.

Leo and his brothers had been 19 to 21 when the invasion had started without warning. Ten years later, their group- The Resistance, had grown from the four brothers and their friend April to dozens more survivors, barely fighting for survival... and one less older brother.

Raph had died early, maybe five years in, but with people being lost constantly, those wounds never had time to heal.

Mikey had harnessed his Hamato Ninpō, an ancient mystic power passed down through their family to become a mystic warrior that their late father would have been proud of. Donnie was the Head of Technology in the resistance, working himself half to death at times, making tech out of what they could scavenge from the Krang and the wasteland itself.

Leo had grown into the leader role in Raph's absence. After losing his own arm, he had chosen to use Raph's old battle armor as a prosthetic.

And then there was Casey. The child of the Hamato family friend, Cassandra Jones, whose death had left behind an orphan that Leo had raised as his own.

Then... Earthquakes started... Getting worse...

Leo: "Ugh, these earthquakes are getting worse!?"

Mikey: "It's ruining the city park!"

Donnie: "Guys, calm down. I'm working on it"