An ordinary modern man, Li Si, unexpectedly travels through time to the Yong'an Marquis Residence of the Great Yin Dynasty, becoming an illegitimate son who is constantly oppressed by his stepmother, Madam Wang, and narrowly escapes being poisoned to death. On the brink of death, he awakens an Intelligence and Martial Arts System. Its core rule is simple: sell the secret information of powerful nobles to exchange for various peerless martial arts techniques at their maximum level. After awakening, Li Si recalls the truth behind the assassination attempt against him and immediately chooses his first target for a transaction—his father, Marquis Yong'an Li Qian. Upon successfully completing the mission, he unlocks the Max-Level Golden Bell Shield.