When Daphne becomes the star of a vampire film, the production is thrown into chaos by a real vampire, forcing the Scooby-Doo team to investigate who's behind this monstrous mayhem.When Daphne becomes the star of a vampire film, the production is thrown into chaos by a real vampire, forcing the Scooby-Doo team to investigate who's behind this monstrous mayhem.When Daphne becomes the star of a vampire film, the production is thrown into chaos by a real vampire, forcing the Scooby-Doo team to investigate who's behind this monstrous mayhem.