Devout sisters and brothers, bound by faith and desire, find themselves in the throes of forbidden lust. In the name of verification, they submit to rigorous tests of their purity, guided by the stern command of their father. Clothed only in their innocence, they tentatively explore each other's bodies, their religious guilt warring with their carnal hunger. As their taboo desires consume them, they sin together, their cries of ecstasy echoing through the hallowed halls of their home.