"Rouge Kou" mainly tells the story of Li Shuping (Gui Yalei) eloping with his sweetheart despite his parents' opposition. After resigning from a generous job, she gave birth out of wedlock, but her daughter wanted to be secretly taken away by her father, which caused Shu Ping to suffer from the separation of flesh and blood.
Later, Shu Ping married Shen Guangyuan (Hsiu-shen Liang). Over the years, she kept this secret and has been looking for the whereabouts of her daughter. However, due to the yearning for her daughter, her two daughters, Zhi Fang and Yu, had a shadow in their hearts, and Guangyuan was caught in a dilemma between his daughter and his wife.
Fan Xuchuan (Vincent Chiao) grew up in an orphanage, lived alone with his sister Meizhu (Zeng Yajun), and had deep affection for her childhood playmate Lin Caijuan (Zhang Ting). When Asahikawa met Ling, he was deeply attracted by Ling's tenderness and took action, but this move made Ling's colleague Shi (Lin Wei) look in his eyes and feel jealous.
Ling saw Zhifang's unhappy marriage and was afraid, but rejected Asakawa's feelings, only to be hit by Cai Juanhe and fall into the abyss of pain again. ...