An atmospheric, chilling take on a broken-up family, kids vs. step-parents and lasting trauma, this third (and rst English-language) feature from directors of Good Night Mommy (2014) captures haunting horrors of entrapment and isolation, which results in a dark climax. Riley Keough stands out as Grace, a stepmom with a troubled backstory who gradually loses her mind with lingering terror. (Jongsuk Thomas NAM)