The drama tells the story of the death of the president of the Holy City University during the Republic of China, the investigation of the murderous female Chen Hao, the swaying son but the reasoning ability, the investigation of the son of the mayor and the detective group of the palace of the Eight Diagrams Palace. Homicide case, with the deepening of the investigation, the mysterious organization Plum Blossom Q gradually surfaced, and there are many invisible enemies. An undercurrent flows unconsciously in the water of the Holy City. Things seem to be more and more beyond theirs. understanding. They faced a lot of suspicions, worked together, and vowed to carry the truth through to the end.