The brother and sister, who had a happy childhood but lost their family, established their own power. In an era when the three major forces were advancing hand in hand, two people with seemingly no background became the largest masters of the underground. In this supernatural world where the strong are respected, will the seemingly righteous mainland forces, the notorious overseas forces or the independent underground neutrality survive to the end?
Concept: A miserable heroine and an even more miserable male protagonist and male supporting character