Stella Goldschlag (Paula Beer) is adored by the boys at her Jewish school. The blonde girl dreams of one day having a great career as a jazz singer. However, her dazzling life comes to an abrupt end when she and her family have to go underground in 1943 to avoid the Nazis. But she is betrayed to the Gestapo and tortured. The National Socialists turned her into a so-called gripper. So that neither she nor her family are deported to Auschwitz, Stella has to deliver other Jews to the knife. By the end of the war, Stella had extradited countless Jewish citizens to the Gestapo. Based on real events.