Watch Stumm (2020) : Full Movie Online Free Katharina’s father used to work for the GDR secret service. In the mid-1990s he was arrested for a murder ordered in connection with his former job … and released. Ever since then, Katharina has feared that the doubts about her father’s innocence might throw a shadow on her life, too. A film about family secrets and the question whether some things hadn’t better remain hidden.