The retired teacher Katharina Krohn can look back on a fulfilled life. However, the 76-year-old no longer wants to experience what lies in front of her. Because she suffers severely from osteoarthritis and a chronic lung disease. The proud lady does not want to allow that to become a nursing case in the foreseeable future. Because she still has it in her own hands, Katharina plans to kill herself with the support of a Swiss euthanasia association. Her daughters absolutely want to prevent that: While the lawyer Maren hopes to give her mother new courage, Heike is ready to go to extremes. The civil engineer tries to incapacitate the elderly woman despite her razor-sharp mind. Although the sisters have the same goal, they soon face each other in a bitter argument. Because Katharina forces Maren to represent her in court. A painful argument begins that dramatically revives old family structures.—ARD Das Erste