When Princess Y/N is threatened to be attacked by the Krang, it's up to Raphael and his ninja turtle brothers to protect her. Y/N is forced into an arranged marriage if she can't find someone to marry by her 18th birthday, and that's exactly when the Krang plan to strike. All hope is lost for her until she meets a mysterious figure within the darkness beyond her balcony. A... mutant turtle? Raphael, Leonardo, Donatello, and Michelangelo together will discover why the Krang want Princess Y/N and what they plan to do with her.