The story describes a woman named Tuzuyin who brought a 5-year-old boy to the home of Hiroshi Nohara and Miyuki and told them that she was the biological mother of Hiroshi and Mikuke's 5-year-old son, Shinsuke. The night they stayed, Nohara's home was attacked by a mysterious ninja group. Shinosuke has been kidnapped. The hidden family of Fazu is the hometown of ninjas, the family that has guarded the earth's energy "Ningtru" for generations. As a result, the survival of the earth was handed over to Shinosuke's ninja.