Orphan Lin Zhiyuan was adopted by an honest garbage-collecting old man, Lin Dehou. The grandfather and grandson depended on each other for eighteen years. Just as Lin Zhiyuan studied hard and was admitted to a prestigious university, his biological parents, Zhao Shichang and his wife—who possessed ten billion in wealth—suddenly sought him out, trying to force him to acknowledge his ancestry with money. Grateful for his grandfather's nurturing grace, Lin Zhiyuan flatly refused. The Zhao family grew furious out of shame, repeatedly making things difficult, suppressing him, and even forcibly occupying the old house. Lin Zhiyuan engaged in work-study while striving to grow, all the while protecting his grandfather. Later, when his grandfather contracted Alzheimer's disease, Lin Zhiyuan resolutely quit his high-paying job to care for him closely. Through all kinds of trials and tribulations, he stuck to his original intention, using filial piety and responsibility to interpret a deep kinship that transcends blood ties.