Pau and his family live happily in a house that built of the wood and branches of an oak tree which he had planted as a child. But one day a fire destroys the forest. Thanks to the rain that begins to fall suddenly, the house is saved in the last breath. This fall, each of Pau’s children plant a handful of acorns to build their own house. And his children’s friends also plant, and so do their friends’ brothers and sisters… And so, little by little, the burnt forest becomes green again.