This is the story of the four Mirabal sisters during the dictatorship of Rafael Trujillo in the Dominican Republic. At school, one of the sisters, Minerva, meets a girl, Sinita, who later became one of her best friends. Sinita eventually confided in Minerva the truth about Trujillo - that their "glorious" leader was a killer. The sisters make a political commitment to overthrow the Trujillo regime. They are harassed, persecuted, and imprisoned, all while their family suffers retaliation from the Military Intelligence Service (SIM).
As vengeance for their political activities, Trujillo orders three of the sisters be killed on Puerto Plata Road, with their driver Rufino, while returning from visiting their husbands in jail. The women and driver are beaten to death and later their vehicle and bodies are dumped off a cliff in order to make their deaths look like an accident.