In the conservative heart of Curitiba, two siblings, both 'crentes', share a secret bond. Their religious upbringing has left them with a hunger for physical connection, yet they're torn between faith and desire. One evening, they find themselves alone in their shared room. The brother, a 'punheteiro', starts to pleasure himself, his sister watching from the corner of her eye. The room grows thick with tension and the scent of their arousal. She can't help but join him, her hand sliding under her skirt, both of them giving in to their taboo urges.