She is the eldest princess of the Qin Yue Dynasty - Nangong Su. She has a noble status but is burdened with the mystery of her life experience. In order for her beloved brother Nangong Fan to ascend the throne, she had to leave the one she loved and marry someone she didn't like, but unexpectedly discovered that the person she married was the one she should love. But in order to avenge her dead mother, she had to hide her feelings. He is the emperor of the Xuan Tang Dynasty - Ling Mo. He is thoughtful and young and promising. Even if he manages the Xuan Tang Dynasty smoothly and is loved by the people of the Xuan Tang Dynasty, he will still be afraid that he has not done well enough. He lives in uneasiness every day, and his beloved people are also murdered by others. I thought that Nangong Suhe and Queen Like other concubines in the palace, he found that he could only feel at ease when he was by her side, and he gradually fell in love with her. Although he found out that she was the little girl he had rescued when he was a child, he also knew the hatred she carried. He didn't say it clearly, and just wanted to protect her secretly from any harm. If life were just like the first time they met, she and he would not fall in love with another person by accident. After many twists and turns, when they meet again, things have changed. Her look back and smile are beyond his reach, but she doesn't know that half of his world can't match her beauty. Where will this beautiful love go...