Su Wanqing, a modern migrant worker, dies suddenly and travels back to the third princess of Daliang, where she unlocks the favorability-binding two-realm shuttle system, and the binding object is Lu Xiao, the general of Zhenbei. She relied on modern materials and knowledge to resolve the border plague and the crisis of the Northern Barbarians' sneak attack. After returning to Beijing, she solved the serial frame-up of the eldest princess and the second prince. She went to the south to use modern equipment to eradicate the floods and uncovered the forces behind the scenes that collaborated with the Northern Barbarians. After clearing out the traitors in the court, Su Wanqing was established as the crown prince based on the support of the people and his merits. After ascending the throne, he implemented new policies that benefited the people, and co-governed the country with Lu Xiangshou, ushering in a prosperous age.
