"Die Sünderin" was the most scandalous movie of 1950s German cinema – but certainly not because of Hildegard Knef′s nude scene. Marina, who has become a prostitute under unfortunate circumstances, finally meets the love of her life. But Alexander, a painter, is fatally ill and might only survive if he undergoes a very expensive surgery. To get the money for the operation, Marina starts to work as a prostitute again. But surgery on Alexander′s cerebral tumor brings only temporary relief and does not fully heal Alexander. Marina cannot stand to see him suffer and kills Alexander with an overdose of sleeping pills before taking her own life.