Based on the webcomic series "Jiok" written by Yeon Sang-Ho and illustrated by Choi Kyu-Seok (first published August 25, 2019) via comic.naver.com/webtoon.
It is the first Korean drama series to world premiere at the Toronto International Film Festival. It has been selected to screen at the Primetime section of the 46th TIFF ahead of its Netflix release.
It was invited to the LFF series thrill section at the 65th BFI London Film Festival in October 2021.
It has its Asia premiere at 26th Busan International Film Festival in newly created On Screen section in October.