In a strict religious compound, two young sisters, raised in isolation, undergo their annual virginity verification. The solemn ritual begins with them removing their habits, revealing their innocent, untouched bodies. The sisters, trembling with anticipation, lie back on the cold stone altar as the priest gently examines them, his hands trembling as he confirms their hymens intact. However, this year, the sisters' curiosity gets the better of them, and they initiate a forbidden exploration of each other's bodies, their fingers tentatively tracing each other's virgin territories.