Lu Zhaowei, a brilliant talent in Jiangnan's grain transport trade, is set up by her own family and forced into an imperial marriage with her sworn enemy, Xiao Jingheng. Pretending to be insane on her wedding day in an attempt to cancel the marriage, she is instead publicly confessed to by Xiao Jingheng. The two agree to a divorce pact after two years. As they spend time together, Lu Zhaowei discovers that Xiao Jingheng has secretly loved her for seven years, and that their years of rivalry were his way of protecting her. Meanwhile, her second uncle, senior fellow disciple, and cousin conspire with northern border merchants to gradually seize control of the Lu family's grain transport business. The two join forces to gather evidence, destroy the conspiracy, clear the wrongful accusations against their fathers, tear up their agreement, and choose each other wholeheartedly as they take control of the grain transport routes across the north and south.