In the sultry climes of Antofagasta, siblings Tula and Pablo find themselves in a taboo dance of desire. Tula, a fiery-haired beauty, catches Pablo's eye as she sunbathes, her curves tempting him to break their unspoken sibling pact. Pablo, a strapping young Antofagastino, can't resist the allure of his sister's body, and soon they're locked in a passionate embrace, their hands exploring each other's forbidden zones. Tula's skilled touch brings Pablo to the brink, but will their lustful secret remain hidden, or will their steamy encounter be exposed?