"The presence of the two saints is a bad thing."

Two girls were chosen by "God" to be the mothers of conception. However, according to an ancient legend, Bianca remained in the royal family as a "princess" and a "saint," while her younger sister, Noein, was cast out into the wild. Many years later, Bianca finally succeeds to the royal family and performs the rite of conception of the Son of God. However, on the day of the ceremony, Bianca is abducted by demons and goes missing. Queen and the absence of the saint is unacceptable. The hastily abandoned Noein was received as a saint in the kingdom, and at the same time Bianca's survival was confirmed.

"The presence of the two saints is a bad thing."

We cannot allow the existence of a saint who has been captured by demons. The kingdom rejected Bianca. Noein, who had joined the royal family to fill Bianca's absence, and who had gained power and the cooperation of the Angels, was now the only one who could do it. In order to relieve the depression she has been feeling, she begins to take revenge against his sister, Bianca.

Meanwhile, Bianca, once known as a saint, is once again swarmed by demons of various races in search of her holy womb. Surrounded by fearless, misshapen things, the fate that awaits her becomes even more gruesome.

Thus, twin sisters with "the same face," "the same figure," and "the same power" are caught up in the struggle between angels and demons, whether they want to be or not.