Lin Wanmu is a top student at a provincial key agricultural university, whose education was funded by contributions from the people of Linjia Village, with every household pitching in. Upon graduation, he gives up a stable, permanent position at a research institute in the provincial capital and resolutely returns to his hometown. Facing the desperate situation of thousands of mu of citrus orchards, the village's main livelihood, withering on a massive scale, he withstands the villagers' doubts and uses his professional agricultural expertise to solve problems caused by soil acidification and fruit tree diseases. He leads the villagers in establishing an ecological farming cooperative, growing high-quality citrus and steadily guiding the entire village toward prosperity, fulfilling his vow to repay their kindness.