· Ling Bing (female protagonist, 28 years old): Leader of the serious case team of the Municipal Criminal Investigation Detachment. Due to an unsolved case many years ago, she has a cold personality and is unsmiling. She is a well-known "case-solving machine" and "iceberg beauty" in the bureau. He is extremely observant and logical, has strict requirements on his subordinates, and is used to keeping a distance from others.
· Chen Mo (male protagonist, 26 years old): An elite criminal police officer transferred from a neighboring city, but his background is actually a mystery. His character seems cynical, humorous, and good at enlivening the atmosphere, but in fact he is thoughtful and has a unique ability to profile criminals. The superficial reason for the transfer was "work needs," but the underlying reason was related to a certain shadow he was tracing.
