The Hungarian noble Nikki von Kormendy is traveling incognito as a blind passenger on the Danube ferry "Fortuna". Captain Korngiebel keeps him busy with various tasks. When the young singer Anny Hofer comes on board, both men fall in love with her and compete for her affactions. Out of sheer jealousy, Korngiebel lets his ship run aground and now fears for his captain's license. But Kormendy generously acquires the boat and leases it to Peter and Anny ... with the sole condition that the ship bear his name from this date forward.