Lieutenant Anders Canitz is a womanizer and gambler from the upper class. He has spent all of heritage and tries to get to his sister's money by engaging her to invest in a shady business project he is involved in.
On an island in the Stockholm archipelago lives a man named Albin who has fallen in love with the new school teacher named Eva. Because of the Winter War the island is isolated and smuggling is rampant, the leader of this operation is named Fritjof and he is also interested in Eva.
The engineer Ragge has taken shipowner Gustafsson's daughter Anna-Greta on a sail cruise and they stay on an island overnight. When the shipowner finds out, Ragge gets sacked from the shipyard where he works.