Mary Jekyll and the rest of the daughters of literature's mad scientists embark on a madcap adventure across Europe to rescue another monstrous girl and stop the Alchemical Society's nefarious plans once and for all. From Paris to Vienna to Budapest, Mary and her friends must make new allies, face old enemies, and finally confront the fearsome, secretive Alchemical Society. It's time for these monstrous gentlewomen to overcome the past and create their own destinies.