Girl Genius: v. 5 Agatha Heterodyne and the Clockwork Princess : Agatha Heterodyne & the Clockwork Princess

Agatha Heterodyne is the last heir to the Maddest of Mad Scientist families, and on the run from the current ruler of Europe. In a fairy-tale castle on a mountain pass, she finds herself at the center of an evil plan to bring back one of the deadliest enemies of recent history.