This document provides a logline and context for a thriller film called "Submerged" about a boy who drowns but his death turns into a murder investigation. The setting and location will be Priory Pond in Reigate Park, UK. Key characters include the victim, a family member being interviewed by the police, and the policeman. Cast and crew roles are identified. Props, costumes, and makeup needs are outlined, as well as permission and health and safety considerations.