[S3] The Foolish Son-in-law of the Tang Dynasty: My Sister is the Crown Princess

The Crown Princess is in a precarious situation due to a plot against her, and Su Hao wields dual hammers to break through Chang'an, forcing Prince Wei to flee into the palace and the aristocracy to pay reparations. Just as the turmoil seems to settle, Empress Changsun suddenly falls gravely ill, and Li Shimin unexpectedly grabs Su Hao's hand, pleading for his help. Can a 'fool' who comes from a horse-breeding background and only knows how to make fine salt and paper truly save the Empress of the Tang Dynasty? And what future will this 'fool' bring to the Tang Dynasty?