Shen Zhiyi painstakingly managed for three years, taking her dowry as the foundation to build up the Cheng family's massive commercial routes in the three northern provinces. Husband Cheng Du returned, yet brought the crown prince's pawn Wen Ruolan home, attempting to seize the career she built with her own hands. Faced with betrayal, Shen Zhiyi refuses to entangle herself in inner-courtyard disputes; grasping private hidden account books and the late emperor's imperial favor, she brings out the divorce letter at the ancestral hall, withdrawing gracefully and pulling away the Cheng family's economic foundation. Leaving the Cheng family mire, she relies on extraordinary business acumen to achieve a strong alliance with Xiao Yan, the Prince of An who holds military power in the northern borders. The crown prince successively lays out plots and schemes, while trade route crises and the game between monarch and ministers follow one after another.