Introduction: Every murder has its own reasons behind it.With the help of criminal investigation, we can restore the killer’s appearance, predict their psychology and unravel the truth.Captain Song Wen of the Criminal Investigation Department has repeatedly solved strange cases using his masterful ability to simulate criminal portraits down to the last detail. With the arrival of the blooming season, the South City Bureau welcomed a new trainee police officer, Lu Siyu, a taciturn officer who is always able to uncover the truth. And behind him there are also hidden secrets…....