There is a detective agency run by Lu Yuan that originally only investigated and resolved family dispute cases, but was "forced" by the police to assist in the investigation because it was related to a murder case. Yan Yan, as the main brainchild of the firm, is well-known in the industry because of his ability to "empathize" with criminals with special psychological problems, and was invited to become a consultant on special criminal cases. Working with the team led by Meng Chaoge, they uncovered vicious cases one after another, but it gradually emerged that there was a bigger conspiracy behind these cases... Note: The two protagonists are not CPs.
Intention: New cases involve old cases. The two protagonists redeem each other.