Tang Congxin, a time traveler, knew that he was an "abandoned son" since he was six years old - he took the identity of Prince Ji's biological son and was imprisoned in Fangzhou Cicada Temple for more than ten years. With the knowledge of modern thinking and asceticism, he quietly accumulated strength. The empress issued an edict to summon King Ji's family back, but it turned out to be a turning point in his fate. On the way, he was kidnapped by Shuobei rebels and forced to become a puppet khan against the imperial court. At the critical moment of life and death, he chose the most dangerous path: turning into a secret agent of the imperial court, using his wisdom to help the imperial court quell the border troubles, and in exchange for himself a "certificate of surrender" to return to Beijing.
Returning to the center of the power whirlpool, as a marginalized member of the royal family with doubtful blood, Tang Congxin faced not only the political opponents in the court who were eyeing him, but also his "biological parents" Prince Ji and his wife who wanted to get rid of him. He did not choose the cunning scheming of house fighting and palace fighting, but broke the situation with insights beyond the times and an upright "yang conspiracy": improving farm tools to calm the people's hearts, offering suggestions for financial management to replenish the national treasury, planning in details, and making moves at critical moments. He and the county prince Helan Raorao, who is in charge of the secret reporting organization "Xuanniao Guard", used each other to rely on each other in life and death, and found true love with Shuobei's wife Xie Xiaoxie in their political marriage. Under the scrutiny of the empress and the strangulation of all forces, he worked step by step, from being an abandoned son that no one expected, to being established as the emperor's grandson, and finally overthrowing his ruthless parents and inheriting the throne after the death of the empress. This is a journey of imperial power that uses wisdom as a blade and human heart as a shield to defy fate and change destiny in a desperate situation.
