Chen Meiru has a withdrawn personality and rarely has friends. She only has one best friend, Jiang Huizhen. When Chen Meiru's birthday came, Jiang Huizhen made a fuss about holding an ingenious birthday party for Chen Meiru
Chen Meiru didn't have much expectation for this birthday party. But at night, he unexpectedly met a man dressed as an ancient Babylonian. Originally, Chen Meiru thought it was a prank played by Jiang Huizhen, so she didn't take it to heart. But this man has been pestering Chen Meiru, telling Chen Meiru that he is a prince. Then he also told Chen Meiru his name. After hearing this name, Chen Meiru fiddled with it first, and was very shocked, because this name only appeared in his diary.
It turns out that when Chen Meiru was writing a diary at the age of 12, all these characters and storylines appeared in her diary. After Chen Meiru investigated slowly, she found that it was not the characters in the diary that appeared in real life, but that they were in two parallel time and space.