Question: Kim Yoon-seok stars in a 2015 South Korean supernatural mystery thriller film based off what award-winning short film?
Sentence (from "Jang Jae-hyun"): Jang served as an assistant director on the blockbuster period drama "Masquerade" (2012) before breaking out with the short "12th Assistant Deacon" (2014) which won Best Film in The Extreme Nightmare section at the 13th Mise-en-scène Short Film Festival, and Best Director Award (Korean Competition For Shorts) at the 15th Jeonju International Film Festival in 2014.
Relevant evidence: No