À Deriva, internationally released as Adrift, is a 2009 Brazilian drama film set during the 1980s that follows fourteen-year-old Filipa as she navigates her burgeoning sexuality during a family vacation in Búzios. The seemingly idyllic holiday completely unravels when Filipa unearths a devastating household secret: her charismatic novelist father, Mathias, is engaging in a passionate extramarital affair with Angela, an American woman living nearby. This discovery forces the teenager into a voyeuristic obsession, tracking her father's infidelities while simultaneously bearing the heavy emotional burden of her mother Clarice's subsequent descent into volatile alcoholism. As her parents' toxic marriage completely disintegrates and they ultimately decide to separate, a disillusioned Filipa experiments with her own newfound sexual power and desires to cope with the pain. Ultimately, the teenager is forced to abandon her childhood innocence and face the complex, deeply flawed realities of adult romance and family dysfunction.