In 210 BC, in Xianyang Palace, 16-year-old Ying Qingyue was Qin Shihuang's favorite daughter. She was well-dressed but full of curiosity about the world outside the palace. Due to an accident (such as touching an ancestral jade pendant, being involved in a palace coup), she lost consciousness in the bright light. When she woke up again, Ying Qingyue was in a luxury apartment in the 21st century, wearing "weird" clothes, and was frightened out of her mind by unfamiliar electronic equipment and vehicles. The owner of the apartment, Gu Shiyan (28 years old, president of a technology company, with a cold appearance but a delicate heart) came home and bumped into Ying Qingyue, who was huddled in the corner, dressed in ancient costume but with clear eyes. He mistook her for a prankster, but noticed something strange in her complete ignorance of modern objects. Gu Shiyan temporarily took in Ying Qingyue, which led to a series of events.
