Alliance of Chanyuan: Dark Bureau

In the first year of Jingde in the Northern Song Dynasty, the deputy envoy of the Liao Kingdom died suddenly in the Bianjing Embassy, ​​and a border defense map temporarily stored there disappeared. Zhao Wujiu, a former detective of the Imperial City Department who was demoted to jailer due to an unjust case, was forced into this fatal investigation. He soon discovered that this was not only a murder, but also a precise trap aimed at him. During the investigation, he and the mysterious businesswoman Xiao Wanying shared life and death several times, and their love grew secretly, but he also discovered that her identity was a mystery. At the same time, the peace ministers in the DPRK tried their best to obstruct it, and a river and lake force named "Qingfeng Pavilion" loomed, and all clues pointed to a Liao spy codenamed "Taotie". When Zhao Wujiu was about to encounter the truth, Xiao Wanying blocked a fatal blow for him. When she was about to die, her true identity was exposed. And the true appearance of "Taotie" was a close relative he had never imagined. In order to save his beloved, Zhao Wujiu took Xiao Wanying, who had lost his memory, to retreat to the south of the Yangtze River. However, the theft of "Mountains and Rivers Map" and the new emperor's accession to the throne once again dragged the two into the whirlpool. When their memories awaken, they must face the final choice together: to fulfill their personal relationship, or to protect this hard-won peace?