Lazy but resourceful storyteller Lapatossu solves problems at the railway construction site with his seemingly simple friend Vinski.
The professor's widow Vivi Cassel has three daughters: pretty Irma and Paula and unattractive, but smart, sharp-tongued Elsa, who is humiliated by the condescending attitude of her sisters and mother. She decides to prove that being a woman is much easier than being a person. After visiting a beauty salon, she makes not only her sisters' suitors fall in love with her, but also the mother's fiancé.
The boyish, temperamental chemistry student Elsa Kassel disapproves of her mother and sisters running after men, but when she hears that she's referred to as "ugly Elsa", she takes on a transformation. The new, charming Elsa tests her attractiveness on men and causes confusion all the way to her mother's new groom, Professor Harjula.
