Seven years ago, a meteor slammed into the city of Shibuya and destroyed it, carrying with it the Worms, alien lifeforms that blend into the human population by copying people’s forms. The paramilitary corporation ZECT fights the Worms, developing the Masked Rider System as their anti-Worm weapon. When the paths of ZECT member Kagami Arata and the mysterious Tendou Souji cross, the day Souji has waited for finally arrives, as he is the man who walks the path of heaven…