In a world plagued by monstrous beings called 'Horrors' emerging from the dark Makai Realm, the capital city's residents find solace within a protective barrier crafted by the mystical Onmyouji. Among them stands Raikou, the valiant Golden Knight, donning legendary armor and vowing to shield the populace from these soul-devouring threats. With loyal companion Kintoki and enigmatic alchemist Seimei by his side, Raikou ventures to hone his Makai Knight skills. Yet, the formidable armor's unforeseen consequences leave him grappling with his limitations. Driven by a quest for self-improvement and redemption, Raikou embarks on a journey to confront his weaknesses and prove his mettle.