Downstairs follows the story of Eileen (Tyne Daly), whose brother Teddy (Tim Daly) has decided to move home and live in her basement. Eileen’s husband is less than thrilled about this. And Teddy is more than a little off his game. As the brother and sister struggle to understand their present and their past, questions of betrayal, disappointment, and madness rise and fall. Who is saving whom?