Elna is a well-endowed nun who lives in Ulunka Village.
One day, her nun-ly duties take her far from home, to the village of Adus.
There, she's tasked with watching over the demon Renis, a monster sealed in a nearby cave. Deep within the cavern, Sister Elna discovers a book...
And releases the creature!
Sister Elna's sacred power keeps her safe as the demon enters her body, but she can't keep it under control for long.
In order to preserve her virtue and that of the village, she has to take a special aphrodisiac every day to quell the monster's urges. If she does this and still stays pure for 7 days, the possession will end.
Will the men around town be eager to help? Or will they give in to their beastly urges?
So begins Sister Elna's week-long trial...