Sophia Franziska Schäfer lives in a small village at the base of Mount Großen Krottenkopf set in the Allgäu Alps in northern Germany. The year is 1818, and she has just been accused of witchcraft. She slept with the Baker's son out of wedlock, and days later he becomes seriously ill after admitting his sin to the local priest.
The pastor believes she has worked a hex, and he gathers a large group of men and hounds to chase after her as she flees the village, heading for the mountains. Sophia only has one chance for survival, to reach Doctor Frankenstein's castle and hide from the angry mob.
The Doctor finds her hiding in a deserted, crumbling part of the fortress, and instead of turning her over, he has her cleaned and fed and offers her a job working for Mrs Beckenbauer the aged cook.
However, after two months, Sophia becomes intrigued as to what the Doctor is doing up in the tallest tower, hidden away from prying eyes. One night, as a storm rages and the Doctor is away, she climbs the steep stone steps and enters his laboratory.
What she finds paralyses her with fear – but also something else – it fills her with primal lust. In that large chamber, something happens to change her world and affect the rest of her life.
