Dual heroine configuration:
Lin Shuying (28 years old): Criminal profiler of the Criminal Investigation Detachment. She has hyperamnesia and the ability to interpret micro-expressions. She suffered from post-traumatic stress disorder due to a failed undercover mission three years ago.
Jiang Jianqiu (26 years old): A forensic engineer who comes from a family of hackers. He is good at data recovery and on-site reconstruction. He joined the police force to find out the truth behind his sister's disappearance.
Core case: "Mirror Image Killer" serial case (throughout the entire article)
