If they were not childhood sweethearts, Yi Chengxin and Nangong Mingxiu would never be tied together. They are not pure lovers, nor pure friends. There seems to be no thing called love between them, but there is a more mysterious tacit understanding surrounding them.
On the road of life, he gives her the space to experience independently, but he will also keep his bottom line willfully; she never expects anything, but she will be sad and melancholy when the tacit understanding is broken... The two of them are walking the path of love in their own unique way. Will they return to the original at the next intersection?