"Yinxin Garden" is a very special garden. There is no spring, summer, autumn and winter here, but spring all year round; there is no day or night, but eternal light. Even if it is a dark night of ice and snow outside, when the sound comes in, it is still a day with the singing of birds and the fragrance of flowers. An invisible and intangible natural barrier, just one step away, but there are two worlds in front, back, left and right.
The Lan Qiao family has protected Yinxin from generation to generation. This is the fate of the Lan family and the Qiao family. If the heirs of the Lan family and the Qiao family are of the same sex, they will make a blood alliance and become brothers and sisters; if they are of the opposite sex, they will kneel down and worship heaven and earth to become husband and wife. The common mission of the two families is to protect a sacred tree located in the center of Xinyuan. The sacred tree can predict the past and the future, and the only ones who can control the predictive power of the sacred tree are the four elders of the southeast, northwest and northwest of Yinxin Palace. The fourth elder does not belong to any one family, but the successor to the elder is selected from the two Lan Qiao families.