England, 1887. After burying her spinster aunt, the orphaned Veronica Speedwell intends to resume her world travels in pursuit of scientific inquiry—and the occasional romantic dalliance. As familiar with hunting butterflies as she is fending off admirers, Veronica wields her butterfly net and a sharpened hatpin with equal aplomb.
But fate has other plans, as Veronica discovers when she thwarts her own abduction with the help of an enigmatic German baron with ties to her mysterious past. The baron offers her sanctuary in the care of his friend Stoker—a reclusive natural historian as intriguing as he is bad-tempered. But before the baron can reveal his secrets, he is found murdered. Veronica and Stoker are forced to go on the run, wary partners in search of the villainous truth…