Medieval nuns Alessandra, Fernanda, and Ginevra lead a simple life in their convent. Their days are spent chafing at monastic routine, spying on one another, and berating the estate’s day laborer. After a particularly vicious insult session drives the peasant away, Father Tommasso brings on new hired hand Massetto, a virile young servant forced into hiding by his angry lord. Introduced to the sisters as a deaf-mute to discourage temptation, Massetto struggles to maintain his cover as the repressed nunnery erupts in a whirlwind of pansexual horniness, substance abuse, and wicked revelry.