Running through the two timelines of the Republic of China and modern times.
Male protagonist Lu Yunhai
The youngest and most capable detective in Shanghai Bund, he has a hot temper sometimes and has a wide network of contacts. He is an old acquaintance of Yu Qingyao. When he came out of the countryside, he met Boss Lu and gave him his surname and helped him. He was promoted to detective by Boss Lu. Although I liked fooling around, I was very rich and had a good relationship with him. If I gave him whatever I wanted, my mood would be relatively stable!
The heroine Yu Qingyao
Her family was not well off and she went to school with Lu Yunhai in the city. When she was studying hard, Lu Yunhai stopped studying. After that, I never saw him again. Yu Qingyao passed the exam abroad through her own efforts and became a slightly famous writer. She heard that Lu Yunhai became a detective, so she wanted to return to China.
Intention: love