Hwang Shi-mok had brain surgery when he was a child, which caused him to lack emotion. Now, Hwang Shi-mok works as a prosecutor. He is rational, but cold and lonely. He is also one of the only prosecutors not involved in corruption. One day, a dead body is thrown in front of him. He meets Police Lieutenant Han Yeo-jin at a murder crime scene. They work together to eradicate corruption at the prosecutor's office and solve a serial murder case.
Shi Mok's non-reaction to the latest murder puzzles those around him, but it begins to affect him unexpectedly. The police try to determine if they're dealing with a serial killer.
Watch Now:AmazonShi Mok learns the true culprit's motives for murder, but believes there is more to the story. Yeo Jin feels an overwhelming sense of guilt.
Watch Now:AmazonShi Mok and Yeo Jin catch Prosecutor Seo red-handed, but that doesn't mean the case is solved. Eun Soo takes matters into her own hands.
Watch Now:iTunesNews of another murder spreads quickly, but not all is as it seems. Shi Mok's personal investigating ends up getting him into trouble.
Watch Now:iTunesShi Mok begins looking into a new, unexpected suspect, but he must tread lightly. Yeo Jin is ordered to report on any information Shi Mok has gathered.
Watch Now:iTunesNew pieces of evidence only increase the list of possible suspects. In the midst of the confusion, a few begin to question Shi Mok's innocence.
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