When modern author Xu Tingfang was urged to write a manuscript, she was accidentally sucked into the computer and traveled through time to become the princess of Nanzhao Kingdom. Facing the complicated etiquette, she was filled with despair: "In ancient times, there were no computers. I couldn't even find my way back. I'm going to die here!"
On the other side, Cheng Yixu, the prince of the Northern Kingdom, accidentally touched the secret room mechanism and traveled to modern times to become the president. Looking at the unfamiliar computer, he was full of confusion: "This square can display characters? Xu Tingfang said it can learn knowledge. Is it something from the immortal family?"
The wonderful thing is that although they are separated by time and space, they can hear each other's voices. When Xu Tingfang complains about the difficulty of learning etiquette, Cheng Yixu will be confused and ask questions; when Cheng Yixu has trouble with modern equipment, Xu Tingfang will complain in her mind. They suspected it was an hallucination, but became accustomed to "quarreling in the air". The princess of Nanzhao and the crown prince Chen Yixu were childhood sweethearts. They traveled through time without her knowing it. The crown prince thought she had lost her memory, and thought to herself, "Is Cheng Yixu my childhood sweetheart?" Cheng Yixu said, when did I become your childhood sweetheart? It's not that you are the one, I... He said something about me, and even joked about guessing his identity - Xu Tingfang was shocked to realize that the other party might be the prince by marriage,
Xu Tingfang searched for clues everywhere, but found nothing; Cheng Yixu found a time-travel mechanism in the modern grandfather's study, but could not send the news to her. The marriage between Nanzhao and Beiguo, this pair of people who have been separated by time and space and connected by the voice of their hearts, finally came together due to fate and marriage, and found their destination in each other's company. The eldest princess Xu Tingfang and Cheng Yixu of the Northern Kingdom have a happy couple. Chen Yixu, the eldest son of the Nanzhao Kingdom, marries Xu Tingfen, the second princess of the Nanzhao Kingdom, and they are happily married.