The Villainess (2017)

A purposeful girl named Suk-hee, from an early age, under the supervision of masters of her craft, learned to kill people in cold blood who prevented her from achieving her goals. One day, she single-handedly dealt with a whole group of elusive bandits. Once in the hands of law enforcement officers, the main character understood that she would go to jail for a long time.

However, her extraordinary abilities attracted the attention of a secret government agency, whose management offered the killer girl a deal: she becomes an agent of a secret organization and works in it for ten years, performing various tasks, and in return will receive a large sum of money and the opportunity to lead a normal life in the future. Since Suk-hee doesn't have much choice, she agrees to the offer, immediately starting a new job. One day, while performing another mission, the fearless killer is faced with his own past filled with nightmares.