Shen Zhao, a doctor of modern materials science, accidentally traveled to the late Ming Dynasty due to an accident in his laboratory. When he woke up, he found that he was involved in a conspiracy to exterminate his family - his father Shen Chongwen held the last clue to a secret of the Hongwu Dynasty. In a desperate situation where his family was overthrown and the world laughed at him, Shen Zhao used modern scientific and technological knowledge as a lever, starting from improving firearms to help the border troops retreat from the enemy, and gradually became involved in the whirlpool of party strife in the court and battles on the battlefield. During the explosion of Wang Gong Factory in the sixth year of the Apocalypse, she discovered that this mysterious disaster was strangely related to her own time travel; and when the famine in the Little Ice Age intensified, she tried to use technological means to deal with natural disasters, but discovered how little personal power was in the face of the general trend of history. In the end, she could save some people and change some details, but she was unable to prevent the inevitable collapse of a dynasty.
