Watch VoirFilms. Inspired by the real-life mystery that captivated the nation, Underbelly: Vanishing Act tells the story of the bizarre disappearance of Melissa Caddick, the high-roller who allegedly embezzled over $40 million before vanishing into thin air. It’s a mystery that has left Caddick’s family, clients and the police questioning everything they thought they knew about her. The popular miniseries re-edited as a film.