The owner of a student study center gets an awkward request and suddenly faces the prospect of raising her dead husband's teenage son by herself.

A working class family move into a new condo purchased after 11 years of hard work. They throw a housewarming party to show his co-workers when overnight a heavy downpour creates an extremely deep sinkhole that engulfs the entire building.

Ah-young, a grown orphan with government aid cut off, starts working as a nanny for Young-chae, a single mother who works at a bar to make ends meet.

One day, three siblings receive a postcard from their mother who left them a long time ago. But all it says is "I miss you." Three siblings are disconcerted by the sudden contact, but eventually, they go on a trip to meet their mother.

A family moves to a quiet and isolated place, but suffers from nightmares on their very first day in the new home.

When a devil-worshipping criminal network plunges Seoul into chaos, the police turn to Holy Night—a trio of supernatural demon hunters—to restore order and defeat the rising evil.

Hae-young is a hopeless girl. She lives with her father who runs a Chinese restaurant, and a younger sibling. One day, her father has a mysterious accident, which places her in a position of responsibility. She is now not only the head of the house and must look after her younger sibling, but also an investigator tasked with finding the truth about the accident, and a fighter standing against the ugly world.

Beyond the invisible boundary, reality twists into nightmare. A seed of doubt takes root—growing into unstoppable fear. In the shadows, someone is watching. Curiosity becomes your greatest danger… and your darkest transformation. Enter the Forbidden Zone—a place no one should ever cross.