After the experiment of Xu Mingyu, a tyrant in modern quantum physics, exploded, he traveled through time and became a "candidate dressed in men's clothing" in the ancient imperial examination room. In order to find a way to return, she was forced to continue her education by disguising herself as a man at Qingyun Academy. However, her amazing talent attracted the attention of the cold-blooded champion Lang Ning Xiuyuan.
When Xu Mingyu explored the forbidden area of the academy to trigger the ancient formation, Ning Xiuyuan took the risk to save her and discovered her daughter's body. The two get closer and closer as they jointly investigate the rift in time and space, but they don't know that the Seventh Prince Zhao Yi has laid a dragnet - he believes that Xu Mingyu is the traveler who can open the "Tianmen" prophesied in ancient books, and the Ning family is the descendant of the gatekeeper who sealed the Tianmen a hundred years ago.
The conspiracy of the court is intertwined with the secrets of time and space. In the final examination room of the imperial examination, Xu Mingyu's identity as a woman is exposed, and Ning Xiuyuan gives up his fame to protect her. At the moment of life and death, Xu Mingyu activated the energy of the jade pendant, but it triggered a double crisis in the two worlds. When a modern scientific research team travels through time, they must make a choice: repair the rift in time and space and never meet again, or stay together at the cost of annihilating both worlds?
