12-Year-old Lin Jiuyue and her sister Lin Jiuxing are children from a single-parent family. They never know who their father is. Faced with all their questions, their mother never mentions a word.
However, during an outing, Lin Jiuyue accidentally discovered an exquisite violin. For Lin Jiuyue, who loves music, this is undoubtedly a great thing. However, as soon as she takes the violin with her, she will have bad luck again and again. One day, the uninvited guest Lin Yang came to the house. The attentive Lin Jiuxing found that her sentimental mother was much more cheerful. At a school music party, when Lin Jiuyue started to perform with the violin, a strange man Lin Hui suddenly appeared. Lin Jiuyue felt a sense of déjà vu when she saw him for the first time. Lin Hui took her and Lin Jiuxing to the Magic Piano Kingdom. Here they experienced a wonderful journey and learned many secrets.
What is the relationship between Lin Hui, Lin Yang and Zhao Chen and Lin Jiuyue? And this magic piano is not ordinary. Why does dad stay away from mom? What kind of grudges are there between them? In the experience of traveling through time and space, the mystery gradually came to light...
