Under the blazing sun, a curious sister and brother decide to explore the roof of their car, leading to an unexpected encounter. Novinha, a fresh-faced teen, and her brother, Oliver, find themselves in a confined space, the heat of the sun and their bodies intensifying the atmosphere. As they lay there, the siblings can't help but notice the growing bulge in Oliver's pants and the dampness between Novinha's legs. Their eyes meet, and a silent agreement passes between them. They begin to touch, explore, and taste each other, their inhibitions melting away under the scorching sun.