Modern risk control Chen Jiu and material engineer Lei Wanjun encounter lightning strike, time-travel to Dazhao dynasty and become beggars. The two rely on modern knowledge to brew wine, improve crafts, unite refugees and artisans to create the Bai-gong Alliance, promote skill-shares, and develop commerce and industry. However, they encounter the fear and suppression of local tyrants and court commissioners, and companions sacrifice one after another. Everyone breaks through, retreats to defend Heishuiyu to establish a kiln stronghold, and even hands out defective blueprints to confuse the court, opening a brand-new struggle.