Manuela "Mani" Semilla wants two things: To get her period, and to thwart her mom's plan of taking her to Guatemala, a place that has always been more of a mystery than an answer. Mani can't imagine leaving behind Las Nerdas, her band of misfit friends, for the summer. But after she finds letters written between her mother and her disappeared-journalist aunt, Mani's idea of what it means to be a woman takes flight. Reading the letters reveals both the beauty of Guatemala and its history of violence against women, and slowly transforms Mani from quiet bystander into budding activist.