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Ui-gang (Jang Hyuk, The Swordman) is a legendary hitman who has decided to retire from the business and pursue a normal life. When his wife takes a trip, she issues a request, for Ui-gang to look after her travel companion’s 17-year-old daughter, Yoon-ji (K-pop star Lee Seo-young aka Anne from GWSN). Ui-gang reluctantly agrees, but when the girl with a wild streak falls afoul of gangsters, she finds herself kidnapped and in a situation more dangerous than she ever imagined. However, while Yoon-ji is in over her head, her captors will also find themselves with more than they can handle when Ui-gang begins tearing the city apart to get her back.