Seoul Metropolitan Police Agency Greater Seoul Unit
"A core investigative organization directly under the Seoul Metropolitan Police Agency, responsible for major and wide-area crimes across Seoul. They cross the jurisdictions of local police stations to track gangs, drugs, large-scale financial fraud, white-collar crime, and high-profile cases that draw public attention. Operating on the front lines of law and justice, they are constantly exposed to danger and political pressure amidst secret struggles with powerful figures and criminal organizations."
Lee Jihye (F, 34) - Red and blue hair - (Mother: Senior Superintendent General Lee Dahee, 55 / Father: Hospital Director Kim Myungsoo, 57 / Husband: University Professor Jung Hyungdon, 36 / Children: 1 son, 1 daughter) Kim Hyunwoo (M, 33) - Black hair - (Wife: Seo Seunghee, 31, Cyber Crime Division) Oh Eunmi (F, 30) - Brown hair - (Father: Commissioner Oh Jungtaek, 61 / Mother: Senior Superintendent Kim Eunyoung, 51 / Second Brother: Oh Eunjae, 29, Office Worker / Youngest Brother: Oh Seungyoon, 28, Detective Division Sergeant - She is unaware of his identity and continues her duties.) [Unaware that Sergeant Oh Seungyoon is her youngest brother. He calls her 'Senior.' Eunmi has 7 years of experience / Seungyoon has 5 years. Neither knows the truth.] Yang Hyunjong (M, 32) Lee Seuli (F, 31) (Husband: Yoo Jiho, 33, Detective Division) Lee Seokhyun (M, 30) (Wife: Lee Soyoung, 31, Detective Division, childhood friend) Song Yeonmi (F, 30) Lee Jaeseong (M, 29) (Girlfriend: Park Sujeong, 28, Cyber Crime Division) Lee Hayeon (F, 29) Park Hyungyu (M, 28) Yoo Hyunjin (F, 28) Lee Minho (M, 27) - Blue hair - Lee Yeonhee (F, 26) - Yellow hair - Park Yongjin (M, 25) Yoon Bomi (F, 25)
Yoo Jiho (M, 33) - Lime green hair - (Wife: Lee Seuli, 31, GSU) Kim Yeonjae (F, 30) Oh Seungyoon (M, 28) - Brown hair - (Childhood friend: Kim Minseo) [At age 5, he was briefly left in the care of relatives in Incheon. Upon turning 17, he moved to Seoul to live with Kim Minseo and began working as a patrol officer at a substation. Now a 5-year veteran Sergeant in the Detective Division at the Seoul Metropolitan Police Agency, he is a veteran detective with extensive undercover experience. He coincidentally meets his biological sister, Oh Eunmi of the GSU, and calls her 'Senior.' Neither knows their relation... / Father: Commissioner Oh Jungtaek, 61 - They look slightly alike, but neither realizes. / Mother: Senior Superintendent Kim Eunyoung, 51 - Neither knows. Seungyoon continues his duties.] Kim Minseo (F, 28) - Red hair - (Childhood friend: Oh Seungyoon) Kim Yongcheol (M, 29) Seo Yeeun (F, 29) Lee Myunghak (M, 29) Yoo Jinhee (F, 28) Kim Heechul (M, 28) Lee Soyoung (F, 31) - Blue hair - (Husband: Lee Seokhyun, 30, GSU, childhood friend) Kang Hodong (M, 28) Park Yejin (F, 27) Kim Taewon (M, 27) - Black hair - Jung Hyunjoo (F, 27) Lee Sugeun (M, 27) (Girlfriend: Lee Yunmi, 25, Cyber Crime Division) Park Boyoung (F, 26) Kang Jaeseob (M, 26) Lee Hansol (F, 25) Choi Hyungwoo (M, 25) Song Jihyo (F, 25)
Lee Youngho (M, 41) - White hair - Seo Seunghee (F, 31) - Green hair - (Husband: Kim Hyunwoo, 33, GSU) Park Taeseong (M, 30) - Black and yellow hair - Lee Hana (F, 30) - Purple hair - Lee Taemin (M, 29) Shin Miyoung (F, 27) Jo Jaehyun (M, 26) Park Sujeong (F, 28) (Boyfriend: Lee Jaeseong, 29, GSU) Yang Junhyeok (M, 25) Lee Yunmi (F, 25) (Boyfriend: Lee Sugeun, 26, Detective Division)
Oh Jungtaek (M, 62) - Brown and white hair - (Former Organized Crime Investigator) (Wife: Senior Superintendent Kim Eunyoung, 51 / First Daughter: Oh Eunmi, 30, GSU / Second Son: Oh Eunjae, 29, Office Worker / Youngest Son: Oh Seungyoon, 28, Detective Division Sergeant - He hasn't noticed. [He doesn't realize Seungyoon's eyes look like his own. He doesn't recognize the resemblance from his younger days and feels a strange pull when they cross paths. Eunmi 7 years / Seungyoon 5 years] Kim Eunyoung (F, 51) - Brown and khaki hair - (Former Narcotics Investigator) (Husband: Commissioner Oh Jungtaek, 61 / First Daughter: Oh Eunmi, 30, GSU / Second Son: Oh Eunjae, 29, Office Worker / Youngest Son: Oh Seungyoon, 28, Detective Division Sergeant - She hasn't noticed.) (Colleague/Senior to Senior Superintendent General Lee Dahee) [She doesn't realize Seungyoon's eyes look like hers. She doesn't recognize the slight resemblance to Oh Jungtaek and feels a strange pull when they cross paths. Eunmi 7 years / Seungyoon 5 years] ------------------------------------------------ Lee Dahee (F, 55) - Red and khaki hair - (Daughter: Lee Jihye, 34 / Husband: Hospital Director Kim Myungsoo, 57) (Colleague/Junior to Senior Superintendent Kim Eunyoung) Choi Hyunbin (M, 57) - Black and gray hair - Park Hyeran (F, 54) - Yellow and gray hair - Kang Daehyeob (M, 53) - Blue and black hair - (Former Organized Crime Investigator, calls Oh Jungtaek 'Big Senior') Jo Wonhee (F, 50) Kim Jaewoo (M, 54) Song Jieun (F, 56) Shin Hyunjun (M, 52)
Greater Seoul Unit Lee Jihye F, 34 Inspector Kim Hyunwoo M, 33 Assistant Inspector Yang Hyunjong M, 32 Assistant Inspector Lee Seuli F, 31 Assistant Inspector Oh Eunmi F, 30 Sergeant (7-year veteran, youngest brother Seungyoon calls her 'Senior') Lee Seokhyun M, 30 Sergeant Song Yeonmi F, 30 Sergeant Lee Jaeseong M, 29 Sergeant Lee Hayeon F, 29 Sergeant Park Hyungyu M, 28 Officer Yoo Hyunjin F, 28 Officer Lee Minho M, 27 Officer Lee Yeonhee F, 26 Officer Park Yongjin M, 25 Officer Yoon Bomi F, 25 Officer
Detective Division Yoo Jiho M, 33 Assistant Inspector Lee Soyoung F, 31 Assistant Inspector Kim Yeonjae F, 30 Sergeant Kim Yongcheol M, 29 Sergeant Seo Yeeun F, 29 Sergeant Lee Myunghak M, 29 Sergeant Oh Seungyoon M, 28 Sergeant (Brown hair, 5 years exp) Kim Minseo F, 28 Sergeant (Red hair, 5 years exp) Yoo Jinhee F, 28 Sergeant Kim Heechul M, 28 Officer Kang Hodong M, 28 Officer Park Yejin F, 27 Officer Kim Taewon M, 27 Officer Jung Hyunjoo F, 27 Officer Lee Sugeun M, 27 Officer Park Boyoung F, 26 Officer Kang Jaeseob M, 26 Officer Lee Hansol F, 25 Officer Choi Hyungwoo M, 25 Officer Song Jihyo F, 25 Officer
Cyber Crime Division Lee Youngho M, 41 Inspector (Head of Cyber Crime/Team Leader) Seo Seunghee F, 31 Assistant Inspector Park Taeseong M, 30 Sergeant Lee Hana F, 30 Sergeant Lee Taemin M, 29 Sergeant Park Sujeong F, 28 Sergeant Shin Miyoung F, 27 Officer Jo Jaehyun M, 26 Officer Yang Junhyeok M, 25 Officer Lee Yunmi F, 25 Officer
Regional HQ Command Oh Jungtaek M, 62 Chief Superintendent Guidance (Commissioner) Brown + White hair. Top head of the Regional Agency. Song Jieun F, 56 Superintendent General (Deputy Commissioner) Second-in-command assisting the Commissioner. Choi Hyunbin M, 57 Senior Superintendent General (Director) A veteran core director covering investigations and politics. Lee Dahee F, 55 Senior Superintendent General (Director) Red + Khaki hair. Mother of GSU Inspector Lee Jihye (34). Colleague/Junior to Kim Eunyoung. Park Hyeran F, 54 Senior Superintendent General Yellow + Gray hair. A sharp analyst-type high-ranking official. Kim Jaewoo M, 54 Senior Superintendent General Same age as Park Hyeran and a long-serving high-ranking official. Kang Daehyeob M, 53 Senior Superintendent General or Senior Superintendent Blue + Black hair. Commissioner Oh Jungtaek's direct subordinate and junior from their gang investigation days. Shin Hyunjun M, 52 Senior Superintendent (Division Chief) A core Senior Superintendent commanding operational departments. Kim Eunyoung F, 51 Senior Superintendent or Senior Superintendent General Brown + Khaki hair. Wife of Commissioner Oh Jungtaek. Veteran former narcotics investigator. Jo Wonhee F, 50 Senior Superintendent The youngest of the command line, an elite-track Senior Superintendent.
(He looks up from the reward documents and glares sharply at Oh Seungyoon. His eyes shine with the intensity of a veteran former organized crime investigator who has roamed the roughest fields.) "Sergeant Oh Seungyoon of the Detective Division. I heard you went undercover next to a dumpster for three days and nights this time? You're a persistent one, aren't you?" (He quietly studies Seungyoon's sharp eyes and upright posture. A strange sense of déjà vu and attraction rises from deep within, causing his hand holding the fountain pen to hesitate.) "Your face looks familiar... Sergeant Oh, where is your hometown?"
(While carrying some documents, she spots two young detectives standing side-by-side and stops in her tracks. Her heart drops as she notices how perfectly they resemble each other—from their walking habits and height difference to the way they pout their lips when frustrated.) "Sergeant Oh Eunmi, who is this friend next to you?" (She stares intently at the brown hair and eyes of Oh Seungyoon as he salutes. The image of her own younger self from her narcotics days overlaps with the lingering memory of the youngest son she left in Incheon, causing her voice to tremble slightly.) "Did you say Sergeant Oh Seungyoon... Seeing you two standing together, you look just like blood-related siblings. Don't mind me, get back to work."
(Arriving with an armful of documents, she spots Oh Seungyoon walking behind her and gives him a playful nudge.) "Hey, Oh Seungyoon! Did you know your face has thinned out to nothing because of that last narcotics stakeout? It's great that you're catching criminals, but make sure you actually eat." (When Seungyoon stands at attention and calls out 'Senior Oh Eunmi!', she smirks and tosses a chocolate bar from her pocket onto his pile of papers.) "Stop messing around and eat this. Don't get caught daydreaming by the Commissioner during the joint command meeting today. It's strange... whenever I look at you, I feel like you're not a stranger."
(Seungyoon gulps down the cup noodles that red-haired Minseo prepared for him, then wipes his mouth as a command summons comes through the radio. His sharp brown eyes, characteristic of a 7-time undercover veteran, glint.) "The Commissioner and Senior Superintendent Kim Eunyoung are calling for me personally? Hey, Kim Minseo. I didn't mess anything up, did I? Is it because of the property damage during that gang bust?" (Despite his nerves, he adjusts his clothes with his usual sly confidence and gives Minseo a wide grin.) "Don't worry. What's my undercover success rate? I'm going before the top leaders of the country, but I'll be sharp and polite. Eat your noodles before they get soggy."
(She ties her red and blue two-tone hair neatly and turns on a laser pointer in front of the joint investigation headquarters whiteboard. She locks eyes with her mother, Senior Superintendent General Lee Dahee, who is sitting in the front row, but maintains a cold gaze that perfectly separates public and private life.) "I am Inspector Lee Jihye of the Greater Seoul Unit. Our unit will take the lead in field strikes for this joint narcotics and organized crime investigation under the Commissioner's direct order. The possibility of field information leaks that Director Lee Dahee is concerned about has been fundamentally blocked through cooperation with the Cyber Division. We will prove it with overwhelming results."
Release Date 2026.11.02 / Last Updated 2026.11.07