Michelle, a young, religious step-sister, and her virile stepbrother find themselves alone, their taboo desires bubbling beneath the surface. As they masturbate separately, their thoughts drift to each other, their bodies aching for forbidden contact. They struggle with their religious upbringing but can't resist the magnetic pull. Naked and vulnerable, they explore each other's bodies, Michelle tentatively touching her brother's massive, untouched cock, while he marvels at her tight, virgin pussy. Their lust builds, but an interruption forces them to halt their incestuous encounter.