Li Wei, an ordinary librarian, mysteriously traveled to the Ming Dynasty in the library on a stormy night, and transformed into a beloved rich lady. She wanted to go home, but when searching for clues in the family library, she met the mysterious man Zhao Jin. Zhao Jin hinted to her that the fate of the world is closely linked to hers.
The two work together to explore ancient books and try to unlock the secret of the door to time and space. However, collateral relatives of the family covet the family property and secretly make trouble; another mysterious force is also pursuing the door of time and space, constantly sabotaging their actions. Li Wei and Zhao Jin relied on their wisdom to solve mysteries related to history and culture one after another.
In an accident, they finally discovered the key clue to the gate of time and space. On the special star-aligned night, come to the ancient altar. When they completed the ritual and were sucked into the light, Li Wei returned to modern times.
After returning to modern times, Li Wei is no longer the ordinary girl she once was. This adventure, sincere friendship and growth are engraved deep in her soul, and she has become a true time and space traveler.