A chance encounter in the bathroom finds Michelle and her stepbrother in a compromising position, each lost in their own world of self-pleasure. Anger flares, but so does an undeniable attraction. Naked and exposed, they decide to explore their taboo desires openly, Michelle's eyes widening at the sight of her brother's throbbing erection. Fantasy takes over, and just as they're about to cross the line, an unexpected intruder forces them to rein in their passion.