Caught in a sudden downpour, siblings rush inside a nearby house, dripping wet and shivering. They strip off their soaked clothes, leaving them in a heap on the floor. As they towel off, their eyes wander, taking in each other's naked forms. The sister, her skin flushed from the cold, can't help but notice her brother's growing erection. He, too, is captivated by her full breasts and the curve of her hips. They stand there, towels clutched in their hands, hearts pounding, as the rain beats against the windows, urging them to give in to their forbidden desires.