The Fourth Miss Unleashes Herself After Crushing Her Scumbag Sister

Lin Suisui is the illegitimate daughter of Lin Zhengbei, the Duke of Yong, who commands two hundred thousand soldiers guarding the northern border of the Great Yong Dynasty. Despite her noble lineage, she has lived in obscurity and poverty in the remote Bamboo Garden of the Duke mansion, neglected by her legal mother, Duchess Wang Qingwan, and unknown to most of her family. Her existence is so marginalized that her name is not even recorded in the family genealogy or the household register. After dying in her previous life during the tragic downfall of her family, she is reborn one month before the disaster strikes. Armed with memories of the future, she realizes that the Emperor, fearing the Lin family's military power, has orchestrated a plot to frame them for treason and seize their assets.

The core conflict emerges when Lin Suisui decides to intervene to save her family from execution and exile. She approaches her grandmother, the Old Madam, and her father, revealing that her eldest sister, Lin Xiner, is colluding with the Grand Marshal of the Jin Kingdom, the enemy state. Lin Xiner plans to plant a forged letter in the Duke's study accusing Lin Zhengbei of plotting to overthrow the dynasty. Although her father initially reacts with anger and disbelief, the Old Madam senses the gravity of the situation and agrees to test the warning. The next day, during the traditional New Year visit, Lin Xiner attempts to enter the Duke's study under the guise of fetching calligraphy books for her son. Hidden guards, placed by Lin Zhengbei, discover the treasonous letter exactly as Lin Suisui predicted, confirming her prophecy.

Upon confirming the threat, Lin Suisui reveals her secret: she has been reborn and experienced the destruction of the Duke mansion in her past life. She explains that her father and grandmother will die in prison, while the rest of the family will be killed by bandits during exile. She identifies the true mastermind as the Emperor, with Lin Xiner and her husband, Chen Yuanqing, acting as his tools. A key conspirator is Yunniang, a Jin princess disguised as a wet nurse, who is currently hidden within the mansion. Lin Suisui takes command of the family's defense, ordering immediate actions to counter the impending arrest. She instructs her father to send their eldest son, the military commander on the northern border, to flee with the army before imperial forces can surround them. She also directs the family to hide their vast wealth in secret locations to prevent confiscation.

To secure political protection, Lin Suisui devises a strategy to ally with the Crown Prince, Song Jingmu, who is currently vulnerable due to the recent death of his mother, the Empress. Her uncle is sent to deliver fifty thousand taels in banknotes to a trusted ally of the Crown Prince, effectively buying the Crown Prince's support. Simultaneously, the Old Madam and Lin Suisui visit Cuiping Nunnery to warn the deposed Empress Dowager, the Emperor's mother, who has been pushed aside by Consort Dowager Shen. Lin Suisui suspects that the Empress Dowager was poisoned in her previous life to remove a potential protector of the Lin family. By alerting her, they hope to prevent her death and gain her influence. The story concludes with the family preparing for a critical confrontation, knowing that the Emperor will likely accelerate his plans now that his initial trap has been discovered, leaving them with only a few days to execute their escape and survival strategy.