When detective Li Linyuan traced the serial murder case, he discovered that all the deceased had dealt with the same old case ten years ago - the aftermath of the death of her best friend Li Meili.
At the same time, a woman with the same face as Li Meili was secretly following her. Her name is Hua Sha, and she is Li Meili's twin sister. For three years, she lurked beside the murderer, waiting for a chance to take revenge.
The two approached each other after ten years of secrets. They are rivals, accomplices, and each other's only mirror.
Purpose: After ten years of chasing the murderer, I finally saw an identical face.