Years later, when the brothers had long stopped being the teenage mutant ninja turtles, and grew old enough to call themselves simply the ninja turtles, The City of New York is still under their watch and protection. Despite saving the world several times over, they keep to the shadows still, and as young adults, have tried to resign themselves that it will likely always be that way. So what happens when they once again end up accidently revealing themselves to a young woman—this time, a bubbly southern college woman named Ivy.