Tianpeng, a fallen divine general, is sent to the mortal world as punishment for breaking celestial laws. Tasked with redeeming himself by filling a "Merit Book" through heroic deeds, he assumes the name Bian Zhuang. While battling demons and helping those in need, he embarks on a series of adventures, facing ancient threats and becoming the hero of many folk tales.

In an alternate time and place, the Daughters' Kingdom is home to beautiful girls who live a peaceful life and have four loyal guardians. Every year, at certain times of the year, holy water would flow from the Daughters' sacred altar, which was the secret of the Daughters' population. The ancestors used the power of the sacred spring to build a border for the Daughters' Kingdom, but they were cut off from the rest of the world from then on.

560 AD. In the thirty-seventh year of Jiajing's reign in the Ming Dynasty, the power of eunuchs was overwhelming. To improve the power of yin and yang, the Feng Shui Master decides to create a tiger arena in the center of the capital. But a strange virus infects animals and now hundreds of mutant tigers are breaking out into the streets and drowning the city in blood.

Gai is a top assassin in Ling'an. In order to avenge his brothers back then, Gai was ordered to go to Beiqi to steal the secret code of the formation. Encountering Ke and Ying on the way, the three of them worked together to try to outwit the letter of the lieutenant general of Kitazaki General Jie. Unexpectedly, Ying had already been bought off, and all this was a big conspiracy. square. Gai, who learned the truth, decided to rescue his comrades, kill his enemies, and eliminate harm for the people.