Introduction: The general's household youth Sun Wu unexpectedly returns to three years ago, just as the Sun estate is about to fall into the Nancang grain contract trap. Teaming up with the clever and resolute Zhang Han, relying on his prophetic memory and meticulous account checking, he sees through the conspiracy of the altered account books. The two rush to the capital to participate in the trade route assessment, peeling back the layers of fog surrounding the old case to reveal the truth behind their fathers' shelved southern trade route plan of years past. Breaking free from the regrets of past fate, safeguarding the rules and trustworthiness of the commercial path, the youth join hands with everyone to restart the trade route and write a brand-new beginning belonging to them.