Sixteen-year-old orphan Yin Shi struggles to survive on the streets of Qingyang City. Even if he steals half a cold steamed bun, he will be chased and beaten by gangsters. When he was about to die, thunder fell from the sky and split the old locust tree. There was a shimmering koi jade pendant hidden at the root of the tree. The moment he took possession of the jade pendant, the warm current dispelled the pain and hunger, and bad luck turned into opportunities: an enemy accidentally broke his leg, a money bag was picked up on the road, a bandit was killed by a landslide... Yin Shi realized that this jade pendant could change his life.
He led the refugees to settle in abandoned villages, cleared wasteland, built canals, built walls and trained troops, and developed the deserted villages into a prosperous "Koi Town". The fame of "Koi Man" spreads widely, such as planting abundant crops, digging wells to get springs, and feasting without getting drunk. However, it also attracts jealousy and suspicion: landlords spread rumors about witchcraft, wealthy businessmen collude with bandits to raid at night, and the government secretly investigates and recruits.
As his power expanded, Yin Shi formed an alliance with the Shen family, a wealthy businessman in the south of the Yangtze River, but was involved in the "Black Wind Hall" banditry and court conspiracy. When the imperial army pressed on and his homeland was in danger, the koi jade pendant once again revealed the oracle: "To break this situation, you need to find the Longyuan Sword." Yin Shi rushed to Kunlun alone, stepping into a larger chess game intertwined with rivers and lakes and legends...
