Yan Yiqing is recognized by the criminal investigation team as a gentle gentleman, but Mo Qiwu is a criminal profiler with a notorious record of evil.
When a portrait of Yan Yiqing appeared at the scene of a serial murder case, the entire police station tried to refute the rumors for him.
Only Mo Qiwu held a cigarette in his mouth and chuckled: "The murderer is confessing to you, Officer Yan."
He leaned against Yan Yiqing's desk and lowered his voice: "Do you think the next person he kills will be a 'substitute' like me?"
The next day, Mo Qiwu disappeared.
And the last words he left were: "Yan Yiqing, aren't you pretending to be tired?"
