Three years after the fall of Southern Chu, the last princess Shen Yili sneaked into the palace of Dajing under the name of the secret guard "Li Niang" with a poison-tempered dagger. She had only one goal - the new emperor Xiao Jingheng's head.
Rumor has it that this emperor was ruthless and murderous. He broke into the Chu Palace three years ago and killed her father and brother in front of the battle. However, he did not establish a concubine after he ascended the throne. He only regarded a Southern Chu Moon Flower as a treasure.
Shen Yili was careful every step of the way, pointing her sword at the dragon chair, but he saw through her flaws time and time again. He handed over military power to her, a "potential assassin", and calmly rescued her when she was in jail. He even mentioned the sweet-scented osmanthus cake in Chu Palace and Tingyu Tower in front of her - those memories of his youth that she thought had been lost long ago.
The vassal king rebelled, Beidi was watching, when the "remnants of Southern Chu" became pawns, when the truth about the death of his father and brother was revealed, Shen Yili's sword wavered on the side of Xiao Jingheng's neck for the first time.
"When I was seven years old, in the Imperial Garden of the Chu Palace, I remembered the half piece of wheat cake you gave me for seven years." He held her blood-stained wrist and pressed the jade pendant engraved with the word "pear" into her palm. "I have been waiting for you. From a boy to an emperor, I have never changed."
She is a subjugated princess who bears a blood feud, and he is the iron-blooded new emperor who dominates the world but has a secret love. This lurking in the name of regicide eventually turned into a two-way gamble in the intrigue.
In the light of the sword and the shadow of the sword, it is hard to break the hatred between the country and the family; when the four eyes meet, it is hard to conceal the secret feelings. She asked: "Which one do you choose, the country or me?" He replied: "I want to protect the country, and more importantly, I want to protect you - even if you still want to take my life."