European journey of lady monsters

Having helped Sherlock Holmes and Dr. Watson in opening the murders in Whitechepel, Mary Jekyll leads a peaceful life in London in the company of her unusual friends - Beatrice Rappacini, Katherine Moro, Judina Frankenstein and Diana Hyde, sister Mary. And of course, all of them can at any moment count on Mrs. Pula - a permanent housekeeper at home.

However, calm is violated by the telegram reporting the abduction of Lucinda van Helsing. Where is the girl and what did her father, Professor Van Helsing, did with her?

In an attempt to find answers to these questions, the members of the Athena club take a crazy voyage from Paris to Vienna, and then to Budapest. On this path, new allies, old enemies and, finally, a meeting with the secret "Society of Alchemists"...