Mona worked at the same hospital as the main protagonist, David Balsiger, who worked as a coroner's assistant, and she came in physical contact with David at one point when she attacked him. After his encounter with the vampiress and learning more about her from an ex-communicated priest named Paul, David encountered Mona he was driving down the street, and he later drives Mona to her home.
Mona later invited David into her house, and it was there that Mona's heel turn began; as she attempted to seduce David before going upstairs to change clothes. She slowly walked downstairs in a black gown and continues seducing David, who resists her villainous advances and headed upstairs to the bathroom. Mona turned heel and revealed herself as the vampiress, Desire, flashing her fangs at David as she followed him upstairs. Shortly afterwards, the evil Desire continued to pursue David and managed to trap him on a balcony, but while leaping towards him, the villainess fell to her death.
- Barbara Stock also portrayed the villainous Scam Woman in an episode of the sitcom Seinfeld, and also appeared as the evil Grace Spencer on Charmed.