The whole film is told by looking at computer, iPhone, TV and other screens, which provides a subsidiary comment on how “we” communicate and even live our lives in this modern age. The story itself is a missing “Gone Girl” mystery, with an intricate puzzle plot that makes sense, except for the speed of the denouement. The central father-daughter relationship could pair with Eighth Grade in a study of difficult adolescence. But what most struck me was the unremarked multi-ethnicity of the cast (as well as the people who made the film): a Korean-American family was presented, without comment, as normal subjects for a missing-girl mystery.