In the tenth year of Shaoxing (1140), the confrontation between Song and Jin changed dramatically. On the Caishi River, blood and fire intertwined. Zhao Heng, the illegitimate son of Emperor Gaozong of the Song Dynasty who was living among the people, rose from Hanjiang boatman to commander of the firearms battalion. He deciphered the fragments of "General Martial Arts" and rewrote the rules of war in the smoke of gunfire. Under the same moonlight, Liang Xueya, the daughter of a maritime merchant from Mingzhou, with a scar from firearm burns on her right shoulder, was lurking as a spy from the Kingdom of Jin. She holds the secret technique of purifying saltpeter and has a talent for deciphering codes. However, in the flames of war to save the blueprint and protect the sea ship, she interlocks with Zhao Heng's gear of destiny. When the three-eyed gun roared seventy years ahead of schedule, the flying kite scouts flew across the blood-red sky; when the Dongting Lake Firearms Camp rebellion turned into beacon smoke, Li Qingzhao recited an adaptation of "Summer Quatrains" before his death; when "Tiangong Weapon Spectrum" was tossed in the flames of war, the Tea Horse Company built 60% of its profits to build the Feishui Ironclad... The centuries-old confrontation between the Song and Jin Dynasties was completely overturned by the black powder technology that was eighty years ahead of its time. She was an undercover agent, and he was a rebellious one; she burned down her family's fleet to exchange for the defense map of the Golden Kingdom, and he confessed to committing suicide for the fire protection camp. The red bird pattern on his shoulders obviously echoes the same, but in the Battle of the Yangtze River Fireboat in the eighth year of Shaoding (1148), he faced a life and death decision - to chase the Jin Emperor or save his lover?
