A butterfly flaps its wings, and Romina's universe is divided into two parallel realities: Flap. Abandoned as a newborn baby, at age sixteen she and her adoptive brother German (Javier De Pietro), despite powerful feelings for each other, know their relationship cannot become a physical one. Flap. Romina (Ailín Salas) and German are drawn to each other as friends, their awkward, adolescent relationship threatening to turn towards something more emotionally fulfilling. Their story alternates between realities, building up an awkward tapestry of endless possibilities...