In the water town of Jiangnan, there are many merchants, and the undercurrents of rivers, lakes and courts are surging. Pei Yansheng was the third son of the Pei family in Gusu. He appeared to be a romantic man, but in fact he was a master of strategy and controlled half of the trade routes in the south of the Yangtze River. Ah Zhi is called a "silly girl", her words and deeds are clumsy, but in reality her heart is like a mirror and she is burdened with lost martial arts. During a cargo ship robbery, she hid in his cabin, and their fates were intertwined. The fireworks in the market hide murderous intent, the government and businessmen collude in secret arrangements, and old cases emerge that involve blood feuds that wipe out families. She concealed her edge with blunt force, while he strategized and worked together to break the situation. From business turmoil to rivers and lakes disputes, their love gradually deepened step by step. He handed the tea, she smiled, and we went to a hidden front together.