Shen Zhiyao, a lone girl from a poor family, finds herself in the body of a poisoned daughter of a Minister of Rites. Given a second life, she uses her frail body to tear through the dynasty's gathering gloom. Crown Prince Xiao Yanting sees through the mystery of her identity, yet chooses to join forces with her and break the deadlock. Xie Zhaohua, a survivor of the previous dynasty, secretly holds an imperial edict. Border commander Pei Yuanqing commands a cavalry force, while palace maid Yun Niang protects a blood-written letter. Every step is taken on the edge of a blade. She must not only clear her name, but rewrite the fate of an empire built on powerful clans and lies.