As humans turn into savage monsters and the world plunges into terror, a handful of survivors fight for their lives — and to hold on to their humanity.

A team of expert mountain rangers put their lives on the line to save stranded trekkers, solve haunting mysteries and protect Jirisan National Park.

A female detective investigates the cause of a high school girl’s death and uncovers a disturbing truth.

Kyung-whan, who's been with the same play team for 15 years, is out to have a get together after the play again tonight. Drinking brings the joy out of everyone but Kyung-whan's wallet is as light as a feather as he's been acting for a long time. However, his pride on acting and the stage is at its highest. Maybe too much. Kyung-whan feels upbeat with all the sweet talk from other members of the crew. And, there he goes again with the preach on acting with the little knowledge he has. While the preach is going on, one of the members' phone rings. It's an ex-member of the crew but now a big time star Nam-hee. Kyung-whan feels uncomfortable after finding out Nam-hee's about to join. He can't say no to it since everybody's excited about Nam-hee's visit and he doesn't want to be the person to ruin it. Kyung-whan gets demoted from the main role to a supporting role with the sudden visit from Nam-hee.