One night, the magical knight Ryuga Dogai who holds the title of "Golden Knight Garo," annihilates the horror Shauras. Then the magician Koyori appears. She has asked Ryuga for help in order to prevent the opening of the Gate of Destruction, the oldest gate where Horrors first appeared in the human world. Guided by Koyori, Ryuga visits Claire City, the city where the Gate of Ruin is hidden, and senses an evil spirit lurking in the bustling crowds...