This is a suspense story, and the background of the story takes place in 2102.
At that time, not only was transportation extremely convenient, but it was also possible to pass through countries connected by land without a passport. From China to France, you could just take the subway. Moreover, the development of cell regenerative medicine has enabled the average life span of humans to reach 100 years old, and the longest life span can be 150 years old.
The extension of life span and the development of medical aesthetics have also led to the emergence of more and more beautiful witches. Various beauty pageants for people aged 60+ are emerging in endlessly. However, no one can still look young after 100 years old, with the exception of one person.
She was born in 1986. By 2102, she had lived for 116 years, but she still looked like she was in her twenties. At first no one noticed anything unusual about her, until a case happened.
Idea: I was inspired by a movie to come up with this story.