A brother and sister, both Danish, find themselves alone and horny. The sister, curious and horny, begins to finger herself, her moans barely contained. Her brother, overhearing, enters the room, catching her in the act. They argue, but the sexual tension is palpable. They soon give in to their desires, masturbating together, the sister's fingers working her wet pussy as her brother strokes his thick cock. Their taboo encounter is cut short by an unexpected visitor.