Laura and her father Wilson arrive at a cottage off the beaten path in order to repair it since its owner will soon put the house on sale. They will spend the night there in order to start the repairs the following morning. Everything seems to go on smoothly until Laura hears a sound that comes from outside and gets louder and louder in the upper floor of the house. Wilson goes up to see what is going on while she remains downstairs on her own waiting for her father to come down. The plot is based on a true story that occurred in the 1940s in a small village in Uruguay. La casa muda focuses on the last seventy eight minutes, second by second, as Laura tries to leave the house unharmed and discovers the dark secret it hides.

Summer is ending and the family hasn't been to the old summerhouse in years. A neighbor calls, warning about noises. Two cousins, Pablo and Nico, have to go and find out what happened, not knowing that they'll find something more than a burglary.

Summer is ending and the family hasn't been to the old summerhouse in years. A neighbor calls, warning about noises. Two cousins, Pablo and Nico, have to go and find out what happened, not knowing that they'll find something more than a burglary.

On June 22, 2014, a house that had existed for 27 years burned down in a fire. Only some video footage and the memory remain.

On June 22, 2014, a house that had existed for 27 years burned down in a fire. Only some video footage and the memory remain.

On June 22, 2014, a house that had existed for 27 years burned down in a fire. Only some video footage and the memory remain.

On June 22, 2014, a house that had existed for 27 years burned down in a fire. Only some video footage and the memory remain.

On June 22, 2014, a house that had existed for 27 years burned down in a fire. Only some video footage and the memory remain.

Hilda must be responsible of a decision that she took long time ago. Her life is altered by the news that her son is coming to visit her after several years away. She tries to replenish her weathered image by the passage of time. This will stir her reality and her link with the past.