One day, a woman named Chiyome Hesogakure with a child of 5 years old visits the Nohara family and claims that she is the real mother of Shinnosuke. On the night of their stayover, the Nohara family is attacked by a mysterious ninja group and Shinnosuke gets kidnapped. In the Ninja Village, the Hesogakure family has been protecting “the earth’s navel”. Now, it is up to Shinnosuke to protect the future of the earth with his ninpo.