This is the second season of the 2017 hit "Secret Forest" about a prosecutor who has lost his emotions delves into the secret of the District Attorney's Office to track down the real criminal.

Though he is rational, a childhood brain surgery leaves prosecutor Hwang Shi Mok to lack emotion. Cold and lonely, he's one of the only prosecutors not involved in corruption. When he meets Police Lieutenant Han Yeo Jin at a murder crime scene, they join forces to eradicate corruption at the prosecutor's office and solve a serial murder case.