In 1977, the Voyager space probe leaves the solar system with a message from humanity recorded in hundreds of languages.

The message in Spanish is recorded in the RNE (National Radio Studios). Almost 50 years later and sick with Alzheimer's, Carmen is facing being transferred from her home in her town to a residence due to the passivity of her children, who believe that she is can no longer remember anything.

However, the message she recorded echoes again in Carmen's head, restoring her memory.