Terrifying news of an unsolved serial killing case strikes the country, putting everyone in fear. One day, a family o...

Moo Chi visits the Head Hunter at the prison and tells him that he’ll not only kill the Head Hunter but find his son ...

Chi Kook has been found at the prison with multiple stab marks all over his body along with a message written in bloo...

After Bong Yi’s grandmother is murdered and a mysterious finger is found at a church, Moo Chi and his team start inve...

An hour-long live broadcast goes on air in hopes to save Han Kook. But Ba Reum sets off to a discreet journey as the ...

After Moo Won is brutally murdered, Moo Chi gives up on everything and only keeps drinking. While Han Kook is still m...

After getting a gunshot wound, Yo Han is in critical condition. Ba Reum gets brain surgery. But after receiving the b...

Ba Reum’s instinctive intuition helps Moo Chi get closer to the bottom of the mystery behind the knots. But he suffer...

Ba Reum finds out about a shocking story behind his brain surgery a year ago. He’s tormented by unwanted memories tha...

Ba Reum finds himself acting a lot more violent than before and realizes that it’s getting harder to control himself....

Ba Reum keeps hearing Yo Han’s voice in his head telling him to kill people. The hallucination eventually made him mu...

After killing Kang Duk Soo, Ba Reum keeps a close eye on how the investigation rolls out. He tries to keep a foot ahe...

The DNA result found on the weapon that was used to kill Kang Duk Soo confuses Moo Chi. Bong Yi joins Hong Ju’s team ...

Ko Nam, a bright and insightful kid finds out about a cat killer around his neighborhood. One day, he promises to sha...

Ba Reum starts to remember everything and is filled with guilt. When Ba Reum sees Han Kook’s mother desperately looki...

Chi Kook’s sudden death shocks everyone and Ba Reum tries to convince Chi Kook’s mom in requesting an autopsy. Meanwh...

Ba Reum finally remembers what exactly happened to his family. He tries to set a trap to catch the mysterious OZ, and...

Moo Chi finds out that Ba Reum was the killer and ferociously charges after him at the station. Moo Chi also suspects...

Moo Chi and Bong Yi get closer to the truth. In the meantime, Ba Reum tries to find his aunt, the last missing puzzle...

Ba Reum makes the final decision to turn himself in and finish one last mission that only he can do. Hong Ju also sha...