Die Millionenmine.

The smart detective Brown had once convicted the criminal Ellen Sandow and brought her to prison. Now he visits her in the infirmary there. When Ellen has served her sentence and left prison, she is first taken to the luxury hotel "Esplanade" with Brown's help, where she is taken in by a wealthy relative of Brown. Ellen threatens to get into the old waters when she meets a former gangster friend in the luxury accommodation. This John Verdon intends to steal a valuable plan from a mining company and is hoping for Ellen's help. But she has learned from her past mistakes and informs Brown of Verdon's sinister plans. After further turbulent events, Brown succeeds in putting the villain down.