Yoon Chan-young

A high school becomes ground zero for a zombie virus outbreak. Trapped students must fight their way out — or turn into one of the rabid infected.

Hyo Jin is a 32-year-old woman. Two years ago, her husband died in an accident. Her husband has a 16-year-old son, Jong Wook, from a previous marriage. Hyo Jin begins to live with Jong Wook.

Seol-Chan, a member of a popular K-pop group, is forced to attend an ordinary school, where he connects with Se-yi, a farm girl from New Zealand.

In-su has a special power to see ghosts. One day, In-su meets a ghost who lost her memory and roams around the school. He opens up to her as they build up a quite special friendship and gradually accepts his power to see ghosts which he once thought of as a curse. In the meantime, students mysteriously go missing one by one while the story of the strange bloody mask ghost spreads throughout the school.

Young Jin is a detective from the regional investigation unit. He solves a mystery with a homeroom teacher.

In the heart of the city, two sisters accidentally come across a serial killer who has turned the sewers beneath a manhole into his secret hideout.