At the end of the Tang Dynasty, the Heavenly Demon Emperor led all the demons from the demon world to invade the human world, and even the power of thousands of disciples from Mount Shu could not resist it. At that time, the leader of Shushan confuses the demons with the ancient method of "summoning gods" and imprisons them in the Demon Locking Tower. He also orders his disciples to form a five-spirit formation to activate the demon-melting water in the tower to speed up the refining of the demons. After seventy-seven and forty-nine days, all the other monsters were subdued. Only the Demon King wanted to break out of the tower because of his powerful monster power. The Demon Locking Tower was in danger! Disciple Wei Jing of Shushan came forward and entered the Demon Locking Tower with the Demon Suppressing Sword. He fought with the Demon Emperor for three days and stabbed him to death. He also died of exhaustion...
——"The Biography of Shushan"
Hong Tide, the incarnation of the water of the underworld, is as heartless and desireless as water. She is the most indifferent and characterless person in the underworld. In the millions of years, she has never done anything except obeying orders, nor has she thought about doing anything. Until she returned to the world across millions of years for a boring task that was purely a prank. In the past - in an unknown time and space, she transformed into him - Weijing, a disciple of Shushan. At this time, everything began to develop in an abnormal direction, whether it was her who had become him, or the indifferent, arrogant, and unruly Demon Emperor... When all the stories began to become chaotic, would history still happen as recorded?