In an inaccessible place between the mountains and isolated from the world, a school is located next to an old monastery. The students are rebellious and problematic young people who live under the strict and severe discipline imposed by the center to reintegrate them into society. The surrounding forest is home to ancient legends, threats that are still valid and that will immerse them in terrifying adventures.
本剧改编自作者横山光辉同名漫画，故事讲述当织田信长的天下统一大业近在眼前时，琵琶湖畔以南蔓延着一个名为《金目教》的诡异宗教。据说不信此教者会遭受可怕的诅咒——。为暗中调查《金目教》的真相，信长决定委托《假面忍者》出马……一名以忍者身份隐于暗处的青年（佐藤大树），最终化身为“假面忍者·赤影”。
