In the 14th year of Zhengtong (1449), the Tumubao Incident tore apart the entire Ming Dynasty like thunder. Lu Huaian, a 22-year-old young man from Hebei Province, brought his 13-year-old sister Wan'er to Beijing in order to find out the whereabouts of his father, who was a soldier. However, he ran into this shocking catastrophe.
The Oara army is pressing down on the territory, and the capital is in danger. Lu Huaian, who was separated from his sister in the chaos of war, took the initiative to join the most brutal battlefield of the Beijing defense war as a gangster for the sake of his promise of "seeing people alive and seeing corpses dead". With extraordinary agility and will to survive, he not only survived the mountain of corpses and sea of blood, but also achieved military success, accidentally opening another door to his destiny.
From a humble citizen, to a low-level spy in Jinyiwei, to the powerful commander of Beizhen Fusi. It took Lu Huaian fifteen years to crawl out of hell and walk on the edge of a knife. What he relies on is never his family background, but his insight into the subtleties of people's hearts, his accurate judgment of the current situation, and his obsession that "his sister cannot be displaced again."
However, when he was only one step away from the pinnacle of power, he discovered that the truth behind the disappearance of his parents, the hidden secrets of his frail and sick sister, and even his own career rise all pointed to a shocking secret that had been buried for many years. Family and country, grievances and resentments, loyalty and righteousness, all the clues finally converge in the center of the whirlpool of "The Incident of Seizing the Gate"...