The story begins with Master Splinter narrating a flashback. Before he could become a true ninja, he had to prove himself to the warrior spirit Sojobo by defeating a creature called the Tengu. Cutting to the present, Splinter's voice-over narration continues as he introduces his four sons in the midst of training; Leonardo, Raphael, Donatello and Michelangelo. Splinter then wonders if he has trained them enough as a masked figure appears behind him.