In the summer of the millennium, Tianjin Wei will face a disaster that should not have happened.
Qi Sanxin, a young technician at the Haihe Sanchakou Hydrological Station, discovered strange and unexplainable fluctuations in tidal data. A drawing that was dyed into a "dragon shape" led him to the dilapidated Anlan Temple by the river. The viewer, Yue Haifeng, revealed the cruel truth: During the Jiajing period of the Ming Dynasty, the ancestors of the Qi and Yue families once established the Zhenhai Feng Shui Bureau for Tianjin, vowing to keep the city safe for six hundred years. However, the destruction of the Japanese army and the impact of the earthquake have brought the formation to the verge of collapse, and the catastrophe has been advanced to the midsummer of 2000.
Scientific data and ancient predictions corroborate each other. Qi Sanxin was forced to face the "Water Letter" flowing from his ancestors, and formed a destiny alliance with Yue Haifeng, who held the "Mountain Letter". They must race against time to uproot the Japanese army's vicious defenses at the bottom of the river, search for the lost fragments of the previous dynasty's magical artifacts, and find vitality in Jinmen's centuries-old folklore and historical scars.
When the tide surges forward, carrying with it the violent force that has been suppressed for hundreds of years, the two guardians will use their wisdom that blends science and mysticism to fulfill a tragic promise that spans time and space in the heart of the Haihe River.
This is not only a rescue, but also an ultimate watch over the city's blood and ancient oaths.