Director : Jo Soo-won

Network : tvN

20 years ago Moo-Yeom’s father was a suspect in the "Gap Dong” serial murder case. Because of the detectives’ oppressive investigation, Moo-Yeom’s father killed himself. Now, Moo-Yeom is a detective and works to capture the killer Gap Dong. The statue of limitations has expired for the serial murder case and Moo-Yeom resigns to the belief that Gap Dong is dead. New clues though for Gap Dong appears in front of Moo-Yeom and he sets out to catch him once and for all.

Episodes

Oldest

S01E01★ 8.01j

Episode 1

Mu-yeom who became a detective for his father, receives news like a nightmare.

S01E021j

Episode 2

Hearing something suspicious about the body of a murder case, Mu-yeom rushes to the crime scene.

S01E031j

Episode 3

It's reported that the first case is the act of Gabdong and there will be a second case of murder.

S01E041j

Episode 4

Mu-yeom is arrested as a criminal, and Yang suggests to compare the DNA of Gabdong and Mu-yeom.

S01E051j

Episode 5

Chief Yang meets Maria and thinks of a girl he met at the scene for a case from a while ago.

S01E061j

Episode 6

Mu-yeom suspects Tae-oh as Gabdong. Tae-oh lets out the story of his dead father to Maria.

S01E071j

Episode 7

The civilians blast anger and attack the police for failing at preventing the fourth case.

S01E081j

Episode 8

Mu-yeom kidnaps Ji-ul and tracks down Tae-oh, with the predicted date for a fifth case approaching.

S01E091j

Episode 9

After finding a corpse, Mu-yeom runs at Tae-oh, and Maria witnesses something shocking.

S01E101j

Episode 10

A phone call rings from the real Gabdong. Mu-yeom finally gets to know the true identity of Gabdong.

S01E111j

Episode 11

Gabdong is finally caught. Mu-yeom starts the interrogation and goes to get his shut mouth talking.

S01E121j

Episode 12

The plane the murder happened at, which Tae-oh was in, makes a flyback.

S01E131j

Episode 13

Tae-oh confesses his crimes, and Maria is shocked after finding out that Gabdong's probably dead.

S01E141j

Episode 14

After finishing the montage, Maria turns the young Gabdong montage into Gabdong of the present.

S01E151j

Episode 15

Mu-yeom and Tae-oh, neither one of them slows down and races to the end of the cliff.

S01E161j

Episode 16

Mu-yeom interrogates to prove Do-hyeok as Gabdong. He gets closer to the secret of the Murder case.

S01E171j

Episode 17

While searching Do-hyeok's house, Mu-yeom finds a suspicious picture frame of the Eiffel Tower.

S01E181j

Episode 18

Tae-oh starts a deal between Do-hyeok and Maria. Mu-yeom notices and makes the two Gabdong gather.

S01E191j

Episode 19

A gunshot rings at the pool Mu-yeom and Do-hyeok are at, and someone falls bleeding.

S01E201j

Episode 20

The trial of the two Gabdong finishes, with hard choices to make, the two fall into a great dilemma.