A serial killer ruthlessly hunts down a deaf woman through the streets of South Korea after she witnesses his brutal crime.

Kyung-min lives alone in a one-room apartment. One day, she found a trace of a stranger breaking into her room and soon a mysterious murder case begins to unravel

Being bullied at school and suffering violence at home, Mi-rae, a middle school loner, lives on the border between reality and fantasy. The only places she feels restful are the computer game world, and the would in the novel she writes in her notebook. As her classmates Baek-hap and Tae-yang come close to Mi-rae, she gradually opens up her mind to them. In the meantime, the computer game service is terminated, and the world in her novel also disappears, leading Mi-rae to face a tough reality again.