The eldest princess Ji Lan, burdened with a heavy family and national hatred, carries the emperor's secret edict and embarks on a dangerous journey alone to assassinate the peace envoy Prince Yong, Ying Jingyuan. This royal nobleman, who has always been known for his decisiveness and ruthlessness, was shocked to discover at the critical moment when his identity as an assassin was about to succeed, that the elegant envoy of the enemy country in front of him was actually the chief adviser he had been with day and night, and even the person she loved most who had vowed to be an eternal ally. This ridiculous identity reversal made her feel sad - it was ridiculous that she had tried all her plans but accidentally killed her loved one, it was sad that she couldn't balance the interests of her family and her country with her children's personal relationships, it was sad that fate had tricked people to this extent. When she stared at this crumbling palace, she couldn't help but let out three laments: one lamented that the majestic imperial power building was about to collapse, the second lamented that the lover beside her pillow was treacherous and unpredictable, and the third lamented that the people in the world were in dire straits. This assassination operation, which began with the flash of swords, eventually revealed a complex picture intertwined with intrigue, betrayal and true love, which closely connected personal destiny with the rise and fall of the family and country. In the whirlpool of love and hatred, it reflected the appearance of all living beings under the torrent of the times.
