The blood moon overturned the mountains and rivers, and Bian Lingyu returned to the dilapidated courtyard where Wei Jingming was 14 years old on the night when Wei Jingming died in battle. With regrets from his past life, he stepped into the imperial examination room as a poor scholar and wrote the answer sheet that changed his destiny. He rescues the wandering swordsman Li Yunqi on the street, meets the eldest princess Song Qingwan by chance in the library, and an emergency report from the frontier leads to his fateful encounter with Wei Jingming - every step of this reborn man stirs up the undercurrent of the court and the world.
In the court, he battled wits and courage with aristocratic families, and implemented the New Deal to touch the foundations of the powerful; during the war on the border, he fought side by side with Wei Jingming, turning military strategies into sharp blades to defeat the enemy. However, the love is deep and lifeless, and the royal marriage, the Queen Mother's decree, and Song Qingwan's conspiracy are like layers of shackles, lying between the two. When a mysterious organization emerges and the remnants of the previous dynasty attempt to subvert the country, Bian Lingyu and Wei Jingming fight hand in hand amidst the rain of arrows from the Xuanwu Gate, but in the end they cannot escape the trick of fate.
The love between children is shattered by the iron horse, and the blood-red conspiracy taints the promise of life and death. Their stories are bright fireworks blooming in troubled times, and songs of loyalty that will never fade in the annals of history. A hundred years later, the butterflies in front of the Shuangbi Temple are still fluttering, telling the legend of the war that has been remembered by time.
