The tale of Karai.

Hamato Miwa aka Karai as been the Shredders Right Hand girl and Second in Command for as long as she can remember. Fighting along him and the Foot Clan. To fight the turtles and their Master and father Hamato Yoshi.

But now at the age of eighteen Karai finds out that Shredder has been lying to her, her entire life. She finds out that Hamato Yoshi is her actual biological father and that she is related to Leonardo, Donatello, Raphael, and Michaelangelo. She now takes on the name Hamato Miwa her actually biological name, and fights along the turtle's and her actual biological father Hamato Yoshi aka Master Splinter. After finding out that Oroku Saki aka the Shredder is the one who killed her biological mother who she never got to know and leaving Hamato Yoshi to burn to death under his own house. And kidnapped her every since she was a baby, ripping her out of the hands of her biological father and mother.

Now Hamato Miwa seeks revenge on the Shredder, even if that means killing her old mentor and father.

After defeating him, will she become the new Shredder and lead the Foot Clan down the right path, the way they should be. Or will she stay in the sewers along with her new Master and father, and her new siblings who see now calls brothers.

Either way as the new Female Shredder or living in the sewers, she promises to protect her new family, from anything or anyone that will do them harm.