Zhu Jiu, a 21st-century chemistry PhD, travels back in time to the fifteenth year of the Hongwu era and finds himself inhabiting the body of a blind little beggar. A mysterious system tells him that he can regain his eyesight by finding his long-lost "Eighth Brother." After arriving in Yingtian, he is taken in by a mysterious wealthy merchant. Using his knowledge to refine pure salt, manufacture colored glass, and improve gunpowder, he quickly rises to prominence. He also becomes entangled in a shocking conspiracy involving the White Lotus Sect, which is kidnapping children and infiltrating the government. With the founding of the Baiwu Academy and the implementation of tax reforms, his name soon shakes the entire imperial court. Then, during a palace banquet, Zhu Yuanzhang suddenly reveals his true identity to everyone. But before Zhu Jiu can even see clearly again, Yao Guangxiao and the White Lotus Saintess have already set their sights on him.