There are two kingdoms that coexist in the world. The Kingdom of White is located in the heavens and is ruled by Queen Iris, while the Kingdom of Black is situated in the barren land below and governed by the King of Darkness. Recently, sinister forces have amassed power, creating a threat to the entire world. Iris takes on the role of Light's chief representative, responsible for preserving balance and keeping the darkness at bay in her kingdom. In the Kingdom of Black, a particular village is terrorized by monstrous creatures, leaving only one survivor - a grieving boy. Skeer, an armored man, recognizes the child's suffering and offers comfort. Believing that the boy has the potential to alter the fate of the kingdom, Skeer names him his heir before passing away. The boy vows to become the Prince of Darkness and replace the current king. He promises to lead the world towards a better path. As Iris and the Prince of Darkness work separately to combat the imminent danger threatening the world, their paths end up crossing. Their bond can potentially determine the destiny of the world.