A brother and sister, alone in the house, succumb to their forbidden desires. She masturbates in her room, her fingers exploring her wetness, while he strokes his growing erection in the bathroom. Caught in the act, they argue, but the tension between them only intensifies. Soon, they're locked in a heated gaze, their bodies aching for release. Together, they masturbate openly, their eyes locked on each other's intimate parts, until an unexpected intrusion forces them apart.