Okay so there's no subtitles to this trailer, but after Hide and Seek, I'm willing to give any Korean thriller a shot. This looks creepy, but could be cheese. There's two synopsis, one is a tease the other gives real details and a better understanding of the story. https://www.youtube.com/watch?v=NholVM7xZj8
Directed by Shin Jae-young With Jeong Kyeong-ho, Jeong Yu-mi, Kim Sae-ron, Jo Dal-hwan,… Synopsis 1: In a neighborhood in Seoul, 10 or so people disappeared without a trace in a 6 month span. While the neighbors feel nervous about not being able to find a clue about it, hair and blood is found on the lid of a Manhole. What happened down there?
Synopsis 2: Su-cheol is a serial killer who uses the city sewers down a manhole as his secret hideout. Late one night, a young girl witnesses Su-cheol's killing and he abducts her. Later her older sister, Yeon-seo, determined to find her lost sister, discovers the manhole and goes down. As Su-cheol's blazing madness explodes due to the uninvited guest in his manhole, the two sisters stand against him in desperate attempts to escape.