NIS agents Cha Dal-geon and Go Hae-ri had a plan, a berserk plan, to keep their hearts guarded all the time. Until something both of them could have never predicted forced them to take desperate measures of not falling in love with each other and ye...
The very calm 2nd-in-command, Warrant officer of Vagabond. Although he is normally a serious person who always follows cases "by the book", he also has a very dry sense of humor. He mainly acts as the interrogator because he is very persuasive and an excellent listener. He serves as the polar opposite to Cha Dal-geon, but is keen to learn his powers of observation. He is portrayed as straightforward and direct, but sometimes makes witty jokes with much of the humour lying in his ability to deadpan.
KONG HWA-SOOK
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Codename: Snow White
The quirky Intelligence and Operations Sergeant of Vagabond. She is well liked by the rest of the team; Go Hae-ri even allows her to take the lead on some interview although she tends to be overly sensitive at times, but she is very intelligent. She has personal vendetta against Edward Park after he used her to infiltrate Vagabond through her ex-fiancè Han Ki-soo. She now seems to have affection for Kim Se-hun.
KIM SE-HUN
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Codename: Shrek
The very dependable Weapons Sergeant of Vagabond. He is frequently trying to imitate Cha Dal-geon in his antics and way of life, such as trying to hypnotize a suspect and failing. He also seems to be more daring than Gi Tae-ung in some ways, such as when he runs into a burning house to save someone and in the process receives second degree burns on his arm. He has also shown moments of immaturity towards his colleagues, showing his sense of humour. He repeatedly tries to work up the courage to tell Kong Hwa-sook his true feelings but always loses his timing.
MAJOR GEN. GANG JOO-CHEOL
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The Director of National Intelligence Unit. His first and foremost concern is about the NIS' public image, and his own. His desire to protect his career and public standing has made him an easy target for Cha Dal-geon's machinations. He deals with the media and oversees Go Hae-ri's Team Vagabond.
HAN KI-SOO
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Codename: Pinocchio
+ He was the Engineer Sergeant of Vagabond. He was one of Edward Park's operatives. He made Kong Hwa-sook fall in love with him just to spy on Vagabond.
KIM HO-SIK
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Codename: Peter Pan
+ He was the Medical Sergeant of Vagabond. Edward Park abducted his family and threatened of killing them if he wouldn't comply with his demands.