Two innocent-looking teens, barely legal and barely related, find themselves alone in the house, their hormones raging. They start innocently enough, playing video games, but the tension between them is palpable. The older sibling, a 19-year-old with a lean, muscular body, can't help but steal glances at his younger sister's growing curves. She catches him looking and blushes, but doesn't stop him. As the day wears on, their touches become more frequent, more intentional. They're both inexperienced, but the electricity between them is undeniable. Finally, they can't take it anymore. They lock eyes, and in a moment of pure, taboo passion, they come together, their bodies entwined as they cross the line into adulthood, leaving their innocence behind.