The regent had plotted against Gu Xijiu for a long time now. He ordered his son to kidnap her when she was alone, then accused her of killing the Devil King.
At that time, Di Fuyi did not say anything else, which made it seem that he also agreed to his statement. Nevertheless, he said that he would find Gu Xijiu first. As long as it could be proven that Gu Xijiu murdered the Devil King, he would not be selfish about the matter and would settle her personally.
Because of Di Fuyi's objective approach to the situation, the regent was relieved. He even pretended to accompany Di Fuyi to look for Gu Xijiu.
Since Di Fuyi was a very capable man, in two days, his investigations led him to the Soulless River, and he concluded that Gu Xijiu was in the depths of the river. Although Soulless River was a raging river, it was also a sacred river in the eyes of the devils. Therefore, no one was allowed to approach this place.