Onna-bugeisha 女武芸者 - was a type of female warrior belonging to theJapanese nobility. Saya Kisaragi arrives in New York and gave Her a home and piece from the U.S military government. She had eliminated the threats on the country before in can spread. She is now a well skilled Warrior. The government decided to let enroll her on a school so some won't suspect her. She soons encounters Shredder's ninjas and Shredder founds out her secrets and ability and wants her to join him. What will happen when she meets the mutant turtles?