Overall I liked the movie but I often found the transitions in character arcs and major plot points clumsy and difficult to follow. For example, the how of someone crossing over and the role of the 'warden' were left under explained. Still despite the flaws the good aspects including the characters and acting held my attention until the end. The Korean series 'Missing: The Other Side' seems to have inspired much of the world building in this movie but the Korean version did a much job of explaining important aspects. For example, when someone passes over the Missing series shows it happening, whereas here the viewer must pick it up from context and the presence of the warden, but his role here isn't really clarified until well into the film.