Two cloistered sisters, hidden away in their room, tentatively explore the boundaries of their taboo desires. They hesitantly touch each other, their fingers tracing sensitive skin, as they confess their secret fantasies. One sister confesses her curiosity about the feel of a hard cock, while the other admits to dreaming of being filled by one. They start with a hesitant masturbation session, fingers delving into wet folds, before building up the courage to touch each other more intimately.