That young man in shabby clothes had the gentlest smile in the world. That year, while he was sleeping among the flowers and plants in Biyun Garden, a beautiful woman seemed to come to him in his dream. And she stayed by his side quietly, as the spring, summer, autumn and winter passed by. This stay lasted for ten years. After the fall of the country, she was no longer Princess Changyao, but he became an enemy general. The promise of an alliance is not made lightly, but a dream every ten years is a startling one.