Two naive, innocent sisters, barely legal and untouched, find themselves in a taboo situation. Their father, a stern and demanding man, commands them to prove their virginity by taking a cock inside them. The girls, filled with religious guilt and shame, hesitate but ultimately comply. They struggle to maintain their composure as they're filled with thick, hard penises, their tight, untouched vaginas stretching to accommodate the massive intruders. As they're pushed beyond their limits, they find themselves falling into an intense, all-consuming lust, their bodies betraying their religious upbringing.