A modern young man, Gu Dao, unexpectedly travels to the fictional Great Qian Dynasty and becomes the legitimate eldest son of the Gu family, trapped in a family power struggle and recently rejected in marriage by Princess Li Xianyun. Faced with adversity, he refuses to remain at the mercy of others and chooses to leave home and establish himself independently. Relying on his talents and modern knowledge, he gradually makes a name for himself. From his first displays of brilliance to resolving a crisis on the border, Gu Dao faces one challenge after another, evolving from seeking to clear his own name to taking responsibility for the people. Meanwhile, Li Xianyun gradually comes to recognize his abilities and noble character. The two move from misunderstanding and opposition to mutual respect and standing side by side. Facing political turmoil at court and threats from foreign enemies, Gu Dao uses his wisdom to protect his homeland, ultimately earning recognition through his abilities and sense of responsibility.