On November 25, 1960, the bodies of three sisters were found near the bottom of a cliff on the north coast of the Dominican Republic. The official daily 'El Caribe' reports that it had been an accident, but it does not mention that a fourth sister lives. Nor does it mention the sisters' fierce opposition to the General Trujillo's dictatorship. This is their story: how Minerva started the tragedy by refusing Trujillo; how Patria became an opponent from the church itself; how Maria Teresa joined the revolution through the love. And how they lost their wings, but not their courage. They were Las Mariposas - "The Butterflies".