During the Republican era, wars were waging. A bizarre murder case in the Mountain God Temple shattered the tranquility of the Submerged Water Town outside Shanhaiguan. The young master of the town, along with a caravan of merchants, returned crazy, while the others died. Rumors spread throughout the town that a female ghost was responsible for this heinous crime, causing panic among the townspeople. Uncle Ying, a disciple of the Maoshan School, used his medical skills to suppress the young master's illness but could not cure him completely; the young master's condition kept fluctuating. A group of shamans led by "Bai Liu Hui" arrived in the Submerged Water Town, performing rituals to exorcise the demons for the young master. Miraculously, the young master recovered instantly, and the three individuals were worshipped as deities by the townspeople. However, strange incidents began to occur in the town, with ghostly figures in the wells and wandering Yin soldiers. The townspeople turned to the "Three Immortals" for help. Uncle Ying investigated the truth behind these mysterious events and became increasingly convinced that everything was orchestrated by "Bai Liu Hui." However, both Hui Wuchang and the Fourth Lord Bai died in succession. Uncle Ying tirelessly searched for clues and suspected that the mastermind behind it all was the leader of the Yi Village, Xian Jiangtao. Yet, the truth became even more elusive......

Legend has it that after Pangu created the world, in order to stabilize the cosmos, the Grand Ancestor Hongjun took the Yin and Yang energies of heaven and earth, refining them into the Profound Heaven Divine Sword using the power of the universe. It stood at the pinnacle of the Nine Heavens, guarding all living beings below. One day, Donghuang Taiyi and Demon Emperor Di Jun engaged in a fierce battle in the heavenly realm. Unintentionally, they disturbed the Profound Heaven Divine Sword, which was in the midst of cultivation. The sword body and scabbard were knocked down to the mortal realm by the combined spiritual power of Taiyi and Di Jun. The sword body was reborn in the Xingxiang Town Zhou Mansion, becoming Zhou Qian, the young master of the Zhou Mansion, losing both memory and spiritual power. The scabbard, carrying memories and residual spiritual power, fell into the Peach Blossom Forest, and became known as the Peach Blossom Fairy due to her efforts to help the world. Donghuang Taiyi severely injured Demon Emperor Di Jun. While escaping to the mortal realm, Di Jun accidentally discovered the fallen sword body, intending to control the Profound Heaven Divine Sword and annihilate the Zhou family. Zhou Qian, continuously cultivating his magical powers, embarked on the path of revenge. In the process of demon-slaying, he met Ling'er, a demon hunter, and they became companions. Eventually, they encountered the destined fate of Peach Blossom. Through the collective efforts of the three, they defeated Demon Emperor Di Jun, safeguarding the safety of the mortal realm....