In 2060, one of the few green cards issued by the Space-Time Administration gave Pu Lan a one-way ticket to the past to conduct scientific research.
Bearing the hopes of countless students and researchers, Pu Lan returned to the Yan Dynasty. She tested one shoddy, bug-ridden invention after another on the people of an era more than a thousand years ago, untouched by modern technology.
Even as technology transformed the lives of people in the past, she still worked hard to preserve the course of history, diligently protecting important historical figures. But she never expected that one day, she herself would become someone capable of changing history.