Her name is Alegría. She is nineteen years old and has her whole life ahead of her. Tonight she has arranged to go out with her classmates. She dresses in front of the mirror with the oversized shirt that exposes her shoulder, showing the tattoo of her favorite butterfly In the kitchen, she says goodbye to her mother. They live alone in an apartment on the outskirts, the first home they have managed to build after a past marked by violence. Now, after many years, they are finally at peace. What neither of them knows is that the kiss with which they say goodbye in the kitchen is the last one they are going to give each other. Returning home at dawn, Alegría meets a group of men in an alley. An alleged flirtation escalates to aggression. At the hospital, Alegría's mother only arrives in time to hear the most terrible sound a mother can face: the last beat of her daughter's heart. Alegría's death shakes a country outraged by the murder of another woman. Massive demonstrations ask for an e