A feature film. An investigation death of a young woman in Nazi-occupied Warsaw. In her official ID she is not Krystyna Holzer.A Jewess kept hidden by a Pole - a polonized Saxon - attorney. Before the outbreak of war, the woman was his student as well as his love. The case is assigned to Detective Chief Inspector , under the control of the German occupiers, but also a soldier of the Polish underground, sworn to execute his orders.