Movie Story : A father and daughter are playing hide-and-seek in an ordinary apartment when the girl vanishes without a trace. Soon a video surfaces showing her holding a sign with a cryptic set of numbers, and it becomes clear she is the first of several children to disappear in a small industrial town. Young detectives Varta Naumova and Maksim Shumov take on the case, but they must also confront their own troubled pasts.