During the Jiading period of the Southern Song Dynasty, the world was undercurrent. The pain of the failure of the Kaixi Northern Expedition has not yet healed. Mongolia in the north has already risen, but the Southern Song Dynasty court, which was more at peace with Lin'an, was intoxicated by the warm wind of the West Lake. A bizarre murder revealed the prelude to a shocking conspiracy: the Kingdom of Jin unearthed a traditional jade seal symbolizing Chinese orthodoxy in its homeland, intending to use it to undermine the fighting spirit of the soldiers and civilians of the Southern Song Dynasty and declare itself the lord of the Central Plains. When the news came, the court was shaken and the world was in turmoil.
Lu Qingyuan, the "Lord of West Lake" in Lin'an City, appears to be from a dandy clan whose family has fallen into disgrace, but is actually an elite detective of the Imperial City Department, codenamed "Jiang Yue". He was ordered to investigate secretly, dealing with poetry, wine, romance, and intrigues. At the same time, Yue Shuangbai, a famous general who fought against the Jin Dynasty and a disciple of the Tianbo Sect, went down the mountain under the orders of his master, determined to recover the jade seal and revive the country. The two met due to a misunderstanding. From being wary of each other to being forced to join forces, they jointly fought against the masters of the Jin Kingdom, the traitors in the DPRK, and the mysterious Nether Cult in the Fengyue Field of Lin'an and the spy shadows in Jiangbei.
From Lin'an to Xiangyang, from machinations to bloody battlefields, this is a battle to defend cultural orthodoxy. However, when the truth about the jade seal comes to light, and when personal emotions conflict with the interests of the family and the country, they discover that the true "orthodoxy" is far from being defined by a single jade seal, but lies in the unyielding spirit and the hearts of millions of people. This is a story about protection, sacrifice and faith. In the torrent of history, it composes a heart-stirring chivalrous legend.
