Bored siblings find themselves alone together during a lazy afternoon. As they each retreat to their respective bathrooms, the allure of the shower proves too tempting for both. The sister, Michelle, begins to pleasure herself, her moans echoing through the house. Her brother, unaware, bursts into the bathroom, catching her in the act. Shock turns to tension, then to heated argument, and finally, an unexpected truce. They decide to explore their desires openly, Michelle taking in her brother's impressive length as he strokes himself. Just as they're about to cross the line, a sudden noise startles them, leaving them breathless and unsatisfied.