In order to save Rui Fengxiang, Shen Shi'an unexpectedly formed an alliance with Yu Nianzhi, who was avoiding trouble. Starting from the "Silk Trade War" in Jinling City, the two uncovered the Yuchang's conspiracy to collude with traitors, but unexpectedly got involved in the border military pay theft case and a smuggling gang posing as military bandits. As the investigation deepened, they discovered that the man behind the scenes was an interest network composed of Blackwater Bank in the concession, officials from the Department of Finance, and local warlords. In the process, Shen Shi'an sheds his dandy coat and grows up to be the helmsman of the north-south trade route; Yu Nianzhi resolves the misunderstanding with his father and realizes the true meaning of "protecting the trade route means protecting the country." The two changed from business partners to life-and-death brothers. In the troubled times of foreign trade monopoly and warlord rule, they used their business name as a shield and wisdom as a spear to protect the nation's business ties and at the same time complete self-salvation and the awakening of responsibility for the country.
