A modern elite special agent transmigrates into the body of the useless Ninth Prince of the Tang Dynasty. Hoping to live a carefree life, he instead receives a secret imperial decree ordering him to rebel! To uncover the truth behind his birth mother's murder, he assumes the alias Xu Ran and rises to power from the borderlands of Longxi. He gathers loyal followers, saves the people, destroys bandit strongholds, takes on powerful local clans, and builds the Heavenly Dao Army, following the strategy of building high walls, stockpiling provisions, and waiting patiently before claiming the throne. Political intrigue and thrilling battles intertwine with lighthearted comedy and high-octane excitement as everyone watches a supposedly useless prince turn his fate around and shake the entire Tang Dynasty.