"The Black Masks", a secret political society, involves the beautiful agent Lydia to apprehend an important official document. Lieutenant von Muehlen is a trusted member of another secret society. He is on the same mission.
The son of a poor fisherman and the daughter of a wealthy landlord fall in love, but meet with obstacles to being together. Their happiness meets with objection by her father, who intends to permanently separate them.
Raoul meets Elvira. He becomes fond of her and they start a relationship. Elvira's daughter has also fallen in love with Raoul. She commence a relationship with him. This leads to a deadly conflict of jealousy.
A motherless child has a tumultuous existence, but she eventually becomes a famous international opera singer. Past and present meet when she performs in her original home town.
Göran Stål, an elegant and spoiled young man, has a relationship with painter Margit Degn, who is deeply in love with him. But Göran has a lot of bad business deals.