Xiao Yunlan, the best swordsman in the world, is cold and arrogant, walking alone, but on a rainy night in the south of the Yangtze River, he encounters Xie Qingyan, the noble son who plays the piano. A song "Sword Spirit", the piano and the sword resonated, making the two people form an indissoluble bond. When Xie Qingyan was assassinated, Xiao Yunlan came to the rescue, only to find out that he was the third prince of the current dynasty and was secretly investigating a major corruption case in military pay.
Xiao Yunlan did not want to get involved in court disputes, but made an exception and escorted Xie Qingyan back to Beijing. Along the way, there are dangers and dangers, and the two are attacked repeatedly, but their love secretly develops between life and death. However, when the conspiracy behind the corruption case surfaced, an even more shocking truth was revealed - Xiao Yunlan's life experience was inextricably linked to the royal family...
The confrontation between the world and the court, the entanglement between life experience and true love. When the final battle comes, can they work together to break it?
Intention: The sound of harps and swords brings a promise of life and death; the rivers, lakes and courts work together to break the mystery.