In the sultry heat of a Brazilian afternoon, two young sisters, novinha and safada, find themselves alone in their cramped apartment. The younger, a novinha, is a picture of innocence, while the elder, a safada, is a wild child with a reputation for her sexual exploits. As they lounge around, the safada's wandering hands begin to explore her younger sister's body, igniting a spark of curiosity and lust in the novinha. They start to kiss, tentatively at first, then with increasing passion, their bodies pressing together, their hands roaming freely. The safada guides the novinha's hand to her wet pussy, teaching her how to touch herself and her sister, their moans filling the air as they lose themselves in their taboo desire.