Unfolding over the course of a late summer's day in the fabled resort town of Sintra, Portugal, "Frankie" follows three generations who have gathered for a vacation organized by the family matriarch (Isabelle Huppert). In this fairy tale setting, husbands and wives, parents and children, friends and lovers --- stirred by their romantic impulses --- discover the cracks between them, as well as unexpected depth of feeling.