Young Gun in the Time

Detective Young Gun specializes in frivolous cases, due to his money woes. One day, a beautiful woman named Song Hyun comes to his office and asks Young Gun to kill a man, but he refuses by citing his profession's moral and honour code. Nevertheless, Young Gun is strongly attracted to the beautiful woman and follows her when she leaves his office. Young Gun then witnesses Song Hyun getting killed in a car accident. He is traumatized over her death and decides to investigate her background. Surprisingly, a woman, who looks exactly like Song Hyun, appears in front of Young Gun. Young Gun knows that the woman is Song Hyun from 3 days in the future. Song Hyun then asks Young Gun to save her life, and he accepts her request. Young Gun has only 3 days to save her, but first, he has to get a time machine.