Bored and horny, a devout young woman sneaks into her brother's room, his scent lingering on the sheets. She tentatively touches herself, her mind filled with forbidden images. Just as she's about to climax, he walks in, catching her in the act. Shocked, they argue, but their heated words only fan the flames of their hidden desires. Soon, they're locked in a passionate embrace, their religious upbringing forgotten as they indulge in their taboo longing.