"The House He Built" is a feature film about a man and his house. Sergio's life is mirrored in the house he built, a labyrinth of books, photos and memorabilia collected over his career as journalist, intellectual, storyteller and public television pioneer. He leads us through his 5-stories home: every single object, book or image filling the rooms he walks in, is the beginning of a new story. Following Sergio's wanderings in his labyrinthine home, the film turns into an intimate excavation of what is memory, as revealed in the dialogues between him and his daughter Caterina - the film director.