Simón transports illegal immigrants to New York, leaving them to their fate. When he is discovered by the coastguard, a young sailor, named Andrés saves his life. But when Andrés falls for Marie—a young protegée of Simón's—conflict erupts.

In the 1950s, Patria, Minerva, and María Teresa Mirabal - who were known by their codename "The Butterflies" - created an underground resistance movement against Rafael Trujillo, dictator of the Dominican Republic. On November 25, 1960, Trujillo had all three sisters assassinated. The assassinations turned the Mirabal sisters into national heroines and symbols of feminist resistance. The documentary interweaves interviews with over forty witnesses to the story, including the Mirabal family friends, colleagues, co-revolutionaries, teachers, and most importantly, their surviving sister, Dedé, along with dramatic reenactments and archival footage.