In 1999, Shen Tao, a girl from Fenyang, fell into a love triangle with Zhang Jinsheng and Liang Jianjun, a young man from a small town. She finally chose Zhang Jinsheng, who was chasing money, while Liang Jianjun could only leave in gloom.
In 2014, Shen Tao and Zhang Jinsheng divorced. Zhang Jinsheng remarried with his son Dollar and went to live in Shanghai, while Liang Jianjun returned to his hometown because of a terminal illness. In desperation, he asked Shen Tao to borrow money for treatment. Due to the death of Shen Tao's father, Dollar returned to Fenyang to attend the funeral. Shen Tao deeply felt the change in his son and knew that he could not stay by his side, but just gave him the key to the house.
In Australia in 2025, Dollar grew up, studied in a Chinese school, and met the teacher played by Sylvia Chang. After the teacher divorced her ex-husband, she was also in a state of instability. The hearts are connected, and the two have a year-long love. Although Dollar has been hanging the key that his mother gave him, he can't remember his mother's name. He only remembers that her name is Tao, which means wave.
