Having squandered their share of their father's inheritance, the Honkavaara brothers Paul and Juho plot to take possession of the inheritance received by their sister Elsa. At Elsa's request, a resourceful private detective sets out to track down the missing will.

Armas, a somewhat frivolous painter, arrives in the outer archipelago with his friend and falls in love with Annikki, the fiancée of a young pilot named Eero. A stormy night brings a resolution to the love triangle.