During the Jiading era of the Southern Song, undercurrents swept through the realm. The pain of the failed Kaixi Northern Expedition had yet to fade, and the Mongols were rising in the north. Yet the Southern Song court, huddled in Lin'an, was lost in pleasure amid the warm breezes of West Lake. A bizarre murder opened the door to a shocking conspiracy: the Jin had unearthed the Imperial Heirloom Seal, a symbol of China’s rightful sovereignty, from their former homeland. They planned to use it to shatter the morale of the Southern Song’s soldiers and people and proclaim themselves rulers of the Central Plains. The news sent the court into turmoil and the martial world into upheaval.
Lu Qingyuan, known as the “West Lake Wanderer,” appears to be a dissolute scion of a once-wealthy family in Lin'an. In truth, he is an elite investigator for the Imperial City Office, codenamed “River Moon.” Ordered to investigate in secret, he navigates between poetry, wine, and intrigue. Meanwhile, Yue Shuangbai, descendant of a famed general who fought the Jin and a top disciple of the Tianbo Sect, descends the mountain on her master’s orders. Her mission is to recover the seal and restore the realm. The two meet through a misunderstanding. Though wary of each other at first, they are forced to join forces, facing Jin experts, treacherous ministers at court, and the mysterious Netherworld Cult amid Lin'an’s pleasure quarters and the web of spies north of the Yangtze.
From Lin'an to Xiangyang, from political scheming to the blood and fire of the battlefield, this is a struggle to defend the rightful heritage of Chinese civilization. Yet as the truth about the seal comes to light, and personal feelings clash with duty to the nation, they discover that true legitimacy cannot be defined by a single jade seal. It lies in an unyielding spirit and the hearts of countless people. This is a story of protection, sacrifice, and faith, a stirring tale of chivalry set against the tides of history.
