Apartment404

A bazaar opens inside a block of flats; the flat suddenly changes.

Six residents trace the truth behind extraordinary events that occur in their residences.

Members chat about the good old days; members get infected with a disease.

The residents visit a vintage tteokbokki café, cheered by DJ Woo-sik's cheesy remarks and nostalgic tunes. A group pursue a mysterious man, leading to a tense showdown. Clues converge, pointing to a single location.