The story takes place in the seventeenth year of Yuanjia (AD 440), the reign of Emperor Wen of the Southern Song Dynasty. At this time, the Southern Song Dynasty and the Northern Wei Dynasty were in a confrontation between the north and the south. The Southern Song Dynasty "Reign of Yuanjia" began to show prosperity, Emperor Wen Liu Yilong intended to expedition to the north to regain the Central Plains; Emperor Taiwu of the Northern Wei Dynasty Tuoba Tao had just pacified Rouran in the north, and the country was strong, but frictions between the two sides continued on the border. At the same time, undercurrents are surging among the people, and there are anomalies caused by "disordered history", but few people are aware of them.
