Set after season 3. Ethan seeks Dracula to get revenge but in doing so, finds out a dark secret... A new girl is in London, Freya Snow and she is staying with Dorian Gray and she has a few secrets of her own. Victor gets asked to do the unspeakable by The Creature he created. Catriona seeks revenge on her grandfather - Van Helsing's death. A new threat, beyond vampires and witches, emerges in London. For all the fans of Penny Dreadful who need closure after the ending of season 3.