The host Su is a famous beauty born in Shanghai. She has been studying in Europe for many years. She is witty and intelligent, speaks many languages, has both talents and looks, is independent, and has the elegance and pride of a little shanghai woman in her bones, as well as the temperament of a new era woman. This play can almost be said to be Ma Yili's personal fashion show. Cheongsam and dress were excellently controlled by Ma Yili, and she was a beautiful woman who came out of Shanghai during the Republic of China.
Luo Qiuheng, the male owner, is a detective in the patrol room. He is calm and decent. At first, he was a bit old-fashioned, which made people think that he was a person who paid too much attention to process rules. After contact with Su, he was slowly impressed by Su's light and wisdom, and changed from questioning to appreciating Su. Later, he and the Soviet Union solved the case and became a couple of immortals.
Sue traveled around Europe and returned to Shanghai to face the crime of her sister's murderer. The Shanghai celebrity is rich, but he never discriminates against others because of his wealth. On the contrary, she is very caring and willing to help people from all walks of life. She was involved in a criminal case at the first banquet when she returned to Shanghai. Since then, she has cooperated with detective Luo Qiuheng to solve the case. She is the founder of Miss Ais detective agency and a knowledgeable private detective.
In order to save her daughter, the murderer who killed her sister thought that blood for blood could save her daughter, so she looked everywhere for a woman born on July 15. Sue's father confused the birthdays of the two sisters, which led the murderer to kill Sue's sister and make her into a clay figurine. Although the murderer was finally brought to justice, he failed to save his sister. Sue and Luo Qiuheng became husband and wife and continued to solve the case.