The case files of Seoul city's metro police investigative squad. Captain Go Ji-seok partners with police investigator Yoo, in-order to capture a serial-killer in a fight for justice.
EPISODE 1
Episode 1
Seoul city's metro police investigative squad meets its 30th anniversary and tasks to convict a petty thief. Yoo-ryung reads an advertisement for new recruits and applies to the squad. She is unsuccessful in application.
EPISODE 2
Episode 2
Yoo-ryung hears suspicious noise whilst on patrol, and enters an off-limit area. Captain Go Ji-seok,finds Yoo-ryung unconscious and warns her never to enter again.
EPISODE 3
Episode 3
Investigator Yoo, faces internal review for shooting at a felon who trampled on the face of the police. The review board takes the issue very seriously in-order to avoid the blames of the media.
EPISODE 4
Episode 4
The Seoul city metro investigative squad investigates a case of contract killing. The squad seeks evidence and witnesses.
EPISODE 5
Episode 5
Kim Won-tae is arrested for charges of assault and battery, and upon search of his history it is revealed an ex-girlfriend was murdered. His girlfriend declines the need for an apprehended violence order.
EPISODE 6
Episode 6
Captain Go and Yoo-ryung experiment with a rumor which states, on the last friday of every month, an all-night clubber disappears on the first train. Captain Go tails a petty thief.
Moon Geun-young
Kim Seon-ho
Jung Yoo-jin
Ki Do-hoon
Jo Jae-yoon
Ahn Seung-gyun
Song Ok-sook
Ahn Sang-Woo
Nam Gi-ae
Kim Jung-young
Shin Yoon Sup
