Monica Moreira Lima, a renowned evangelical sexologist, finds herself in a compromising situation at a private spa. While consulting with her colleague, Serginho Groisman, about human sexuality and answering questions from curious clients, she can't help but feel the tension building between them. The steamy atmosphere of the spa, filled with the scent of exotic oils and the sound of distant waterfalls, seems to be awakening desires they both struggle to suppress. As they move from the sauna to the massage table, their professional demeanor begins to slip, leading to an intense, forbidden encounter that blurs the lines between their roles as sexologists and lovers.