Qin Yanyue is a very quiet girl, her mother died when she was five years old, and she came to her father's house.

It's an unfamiliar mansion with lots of chic little buildings, beautiful landscapes and lots of people coming in and out. But for Yanyue, there is no mother here, no familiar people and things, and her father took her over and left after a few sentences, leaving behind two women, a piano, and a house that belonged to her.

The two women are in charge of Yanyue's daily life, but Yanyue only has a good relationship with one of the women, named Aunt Cui, who later learns that this woman has a daughter who is three years older than her.

When Yanyue first came to this house, she was bored alone, so her father gave her a gift to relieve her boredom, but she actually asked her to choose one herself. Yanyue didn't know what gift she wanted, and when she saw this piano, she asked for it, because she remembered that her mother seemed to have one like this. My father was very happy and said that this piano was originally Yanyue's, and a sentence was engraved on the piano: 'Smoke cage cold water moon cage sand', this is the origin of Qin Yanyue's name.

In front of the house is a small courtyard and next to it is a very nice attic. There is a sister living in the attic, and Yanyue rarely sees her, and occasionally the sister can be seen meditating alone on the balcony of the attic, but Yanyue likes this sister very much and wants to talk to her. So Yanyue began to learn the piano, and she thought that she would talk about a song for her sister.

Qin Louyue lived in this attic, and she knew that her father had brought a younger sister back, and occasionally when she was resting on the balcony, she would see this younger sister playing the piano in the small courtyard in front of her. She also wants to play with Yanyue, but she doesn't have time, she has to practice and follow her brother to run errands outside the house. Lou Yue felt that her father didn't like her, and her father said that 'Qin Lou dreamed of Qin Louyue' was the origin of her name.

Later, the two sisters would play together when they had time. Playing the piano, practicing swords, and admiring the moon in this small courtyard together. Yanyue has no friends here, Lou Yue dotes on this sister even more, and does not allow others to bully this sister, and every time she comes back from going out, she will bring back a lot of gifts, and will tell her stories in the rivers and lakes outside. The more Yanyue grows up, the more she wants to get out of the mansion to see the outside world.

Until one time, Qin Louyue went out without notifying Yanyue, Yanyue was very sad, and played her latest song in the courtyard alone. By the end of the bomb, more than 400 people had died in the house, including the two women who lived with her, and many of her relatives.

The song she plays is called 'Tone Dust'.

The sound of the flute is swallowed, the sound is decided, the rivers and lakes are stormy overnight, and the Xianyang Ancient Road is overwhelming.

Qin Louyue was surprised when she heard the news, and she was very nervous about this younger sister. She hurried back to the mansion, secretly took Yanyue out, and took her into the rivers and lakes from then on......