In the sultry heat of Caxias do Sul's hills, a virgin's curiosity leads her down a path of no return. Tiuzao, a local man known for his charisma and charm, finds himself the object of his young stepsister's forbidden desire. As she tentatively explores her newfound lust, the 'guria' of 19 years finds solace in the explicit images hidden away by her brother. Meanwhile, Tiuzao, aware of his stepsister's burgeoning desires, struggles with his own growing attraction. Their shared home in the remote Serra becomes a stage for their secret, taboo dance, as they grapple with the consequences of their forbidden trysts.