The well off daughter of a tenor breaks up a romance with a helpful youth from a misunderstanding. But she continues to cover him with his gambling debts despite her delicate health.

When the famous singer Grace Collins got off the plane that had flown her a remote place in Northen Africa little did she know she would meet love and adventure there. If she came there, it was to visit Sir Collins, her stepfather. Falling in love was not on the agenda but how could she resist the charm of Nic Brenten, an alluring and idealistic Dutch engineer? Butcan devotion and generosity really compete with the greed of someone like Sir Collins, a cynical financier who wants to dispossess the locals of the copper mine Brenten helps them to develop ?...

This Nazi propaganda film follows the exploits of a German submarine as it prowls the North Atlantic.