In the Tianshun Dynasty, during the Xuande period, the ninth son of Emperor Ying Tian came to the throne and changed the country's name to Yongchang, which was known as Emperor Yongde in history. Emperor Yongde ascended the throne at the age of nine and ruled for twenty years. Haiyan and rivers were clear, and the world was peaceful. However, the world did not know how many undercurrents were surging under the palaces and temples.