A mischievous 23-year-old sister and her precocious 9-year-old brother share a secret language of desire, their bodies awakening to forbidden urges. She tantalizes him with glimpses of her maturing figure, while he explores his newfound lust in secret. Their taboo dance reaches a fever pitch as he sneaks into her room, catching her unawares, and they find themselves face-to-face with their mutual, sinful longing, unable to resist the pull of their incestuous taboo.