Zhuang Ran and Lu Yuan were college sweethearts, but they parted ways due to various reasons. Lu Yuan married Lin Yiqian, a daughter of a wealthy family, while Zhuang Ran worked alone in a financial company in his hometown, a small city, and later married and had children with the company's owner, Shang Junyao. Shang Junyao died of illness, leaving behind Zhuang Ran and a pair of young children. Two years later, Zhuang Ran died in depression. Before his death, he said that his unfinished wish was in a qualified safe, and the key was... Before he could finish his words, Shang Junshun and Lu Yuan embarked on a journey to find the key. One in order to complete the unfinished protection of his lover, and one in order to suppress the love in his heart that he never dared to say, and at the same time return to the road Zhuang Ran walked and feel her memory. Zhuang Ran's shadow has not become blurred because of the passing of life, but has become clearer during this journey...