Nikki Carlisle, the innocent-looking blonde, is about to experience a sexual awakening. Her stepbrother, home from college, catches her masturbating in the bathroom, her fingers buried deep inside her tight pussy. Instead of reprimanding her, he joins in, pulling out his hard cock and stroking it in front of her. Nikki, unable to resist, reaches out to touch it, feeling its thickness and length. He guides her, showing her how to jerk him off, how to make him moan. Their encounter is interrupted when their parents return home, but the damage is done. Nikki is hooked, sneaking into his room every night, eager to learn more, to feel more, to fuck more.