Twenty years ago, a pair of twin sisters were separated due to their parents' divorce. Twenty years later, many murder cases called "Chosen Sons" occurred in the city where sister Su Ye lives. As a rookie police officer, she solved these cases again and again. But in the process of solving the case, she found traces of some acquaintances. At this time, her sister Su Tian came to her sister's city under the pseudonym Ji Tang.
"Sister, how have you been over the years?"
"Fortunately, it's all over."
"Sister, do you hate them?"
"Who knows."
Concept: The environment affects people's character.