Kyung-min, an ordinary office worker, lives alone in a studio. One evening, coming back home, she finds the cover of her doorlock left open and changes the code. But that night, before she goes to bed, she hears a terrifying sound: ""beep, beep, beep... You have pressed the wrong code."" Horrified, Kyung-min reports the police but they don’t give much attention to Kyung-min’s frequent report. Sometime after, when a trace of intrusion is found in Kyung-min’s studio and a murder takes place, Kyung-min sets on solving the case herself… Doorlock’s open cover Its keypad covered with unfamiliar fingerprint Cigarette stub at the doorstep… Strange traces in the space where I live alone HE’S COMING AT ME