Annie, a famous vlogger, and her two best friends – Iveta and Milena – are shooting an episode for her new online series “Bulgaria’s Scariest Places” inside an abandoned building deep in the woods of Lyulin Mountain. In the name of good content, they decide that it’s best to spend the night there all alone, aiming to capture the strange phenomena which have been reported for years. When night falls and Milena goes missing, the girls quickly realize that they are not alone, and that whatever evil inhabits the place, it has no intention of ever letting them leave.