Ximena, an illiterate woman in her fifties, lives alone and tries to keep her illiteracy a secret. Jackeline is a young unemployed school teacher who seeks to convince Ximena to take reading classes. Persuading her proves to be almost impossible, till one day Jackeline finds something Ximena has been keeping as her only treasure since she was a child: a letter her father left when he abandoned her many years before. Gradually, the two women embark on a learning journey together.