This document provides details for a short film with the working title "Vanishing Balloons". It describes the main characters, including David, a serial killer who preys on children, and a young girl at the park with her mother. It outlines casting ideas and inspirations, conventions that will be used including crime and psychological elements. The storyline involves David kidnapping the girl at the park while her mother is distracted on her phone, with flashbacks to earlier killings. Locations, mise-en-scene needs, and costume details are also noted to realize the film.