The film contains several subtle "Easter eggs" that reference South Korean history and the 2014 : Trivia - Gonjiam: Haunted Asylum (2018) - IMDb
As they explored deeper, they stumbled upon a room that seemed untouched since the hospital's closure. A single, leather-bound book lay on a dusty desk. Ji-hyun, intrigued, opened the book, revealing a detailed account of the asylum's inhumane treatments and patient abuse. gonjiamhauntedasylum2018720pblurayx264jr best