The 50,000-year return to the ruins event tore the seal, and the ancient mythical beast Xuanwu took the opportunity to escape, transforming into Xuanqing, a roasted sweet potato hawker, and hiding in the fireworks of Yongning City, the capital of the Great Zhou Dynasty. He just wanted to temporarily avoid the pursuing soldiers of Guixu, but when setting up a stall, he accidentally rescued the second prince Zhou Jingyan who lost control of his horse, and discovered that the dandy prince had a strange mark of Guixu on his body. Tushan Fox Fairy Bai Li was ordered to enter the world to investigate the strange phenomenon in the city, and discovered that Xuan Qing was unusual. The two reached a deal: Bai Li would help Xuan Qing conceal his aura, while Xuan Qing would explore the secrets of the prince. With in-depth investigation, they discovered that Zhou Jingyan was bewitched by the national master Xu Chenzi, and the main seal of Gui Xu was planted in his body. There was actually a huge fragment of the "Gui Xu Yin" formation buried under the ground in Yongning City, and the people in the city had been unknowingly eroded by the aftermath of the mark. Xu Chenzi secretly captured the local gods and refined them into formation eyes, in an attempt to completely activate the formation on the night of the full moon and turn Yongning City into the projection of Gui Xu in the human world. Xuan Qing and Bai Li formed an alliance, and while facing the constant influx of Guixu pursuers, they were determined to prevent this catastrophe while struggling with their inner divinity and demonic nature. However, Zhou Jingyan drifted in and out of consciousness under the erosion of the mark, and his true intention became the key hope to break the situation. The fire in the market reflects the undercurrents of the three realms, and the sweet fragrance of sweet potatoes interweaves with intrigue. A turbulent journey that revolves around the mystery of Guixu and affects the three realms of humans, immortals and demons quietly begins in the fireworks alleys of this prosperous ancient capital.
