The title draws its inspiration from William Shakespeare's "Twelfth Night" - specifically, it's 12 Nights, 12 Horror Stories, set in a haunted, harrowing ghost city.
The film took 7 days to shoot.
Showtime's Masters of Horror or Korea's own Horror Stories series have to some extent popularized the omnibus-like format-but while the aforementioned series' installments are only tangentially connected, the first chapter of this film features four episodes with recurring characters, settings, and events that all combine into an organic, comprehensive whole.
Crowdfunding was used to get additional funds during post-production.