Kamen Rider Hibiki's main focus is the teacher and apprentice-like relationship between Adachi Asumu and the Oni called Hibiki. Asumu is a young boy unsure of himself and is at a crossroads in his life as he transitions to high school. As the series progresses, he learns to be an adult through watching Hibiki and the other Oni. The secondary focus of the series is the ancient battle of the Kamen Riders (referred to as Oni in this program) and the Makamou, demons that can only be defeated using "pure sound". The series follows the training and changes of the four main Oni, Hibiki, Ibuki, Todoroki and Zanki 自古以來,在日本,有很多為了保護人類,而在深山進行嚴苛的修行變身成為鬼,以清澈的聲音與魔化魍戰鬥的人。這樣做是為了對抗魔化魍。漸漸的,鬼按照自己的能力進行分類,並且變成可以被繼承的流派,更與那些曾被自己所救的人類,組成一個名叫「猛士」的組織。