Megan Xu, who values wealth over character, forces her sister Zara Xu to marry Caleb Lowe in her place. Caleb's herbs yield a huge harvest, making the Lowe family wealthy. Megan, filled with envy and regret, tries to take back the betrothal, firmly rejected by Caleb. Zara grows into an independent shop owner through mutual support with Caleb, and the couple leads the entire village to grow medicinal herbs and become rich together.